Intelligent design (ID) is the concept that "certain features of the universe and of living things are best explained by an intelligent cause, not an undirected process such as natural selection." Its leading proponents, all of whom are affiliated with the Discovery Institute, say that intelligent design is a scientific theory that stands on equal footing with, or is superior to, current scientific theories regarding the origin of life.

An overwhelming majority of the scientific community views intelligent design not as a valid scientific theory but as pseudoscience or junk science. The U.S. National Academy of Sciences has stated that intelligent design "and other claims of supernatural intervention in the origin of life" are not science because they cannot be tested by experiment, do not generate any predictions and propose no new hypotheses of their own.

United States federal courts have ruled as unconstitutional a public school district requirement endorsing intelligent design as an alternative to evolution in science classes, on the grounds that its inclusion violates the Establishment Clause of the First Amendment. In Kitzmiller v. Dover Area School District (2005). United States federal court judge John E. Jones III ruled that intelligent design is not science and is essentially religious in nature.

Intelligent design in summary

Intelligent design is presented as an alternative to purely naturalistic explanations for evolution. The stated purpose is to investigate whether or not existing empirical evidence implies that life on Earth must have been designed by an intelligent agent or agents. William Dembski, one of intelligent design's leading proponents, has stated that the fundamental claim of intelligent design is that "there are natural systems that cannot be adequately explained in terms of undirected natural forces and that exhibit features which in any other circumstance we would attribute to intelligence."

Proponents of intelligent design look for evidence of what they term "signs of intelligence" — physical properties of an object that they assert necessitate design. The most commonly cited signs include irreducible complexity, information mechanisms, and specified complexity. Design proponents argue that living systems show one or more of these, from which they infer that some aspects of life have been designed. This stands in opposition to mainstream biological science, which relies on experiment and collection of uncontested data to explain the natural world exclusively through observed impersonal physical processes such as mutations and natural selection. Intelligent design proponents say that while evidence pointing to the nature of an "intelligent cause or agent" may not be directly observable, its effects on nature can be detected. Dembski, in Signs of Intelligence, states: "Proponents of intelligent design regard it as a scientific research program that investigates the effects of intelligent causes. Note that intelligent design studies the effects of intelligent causes and not intelligent causes per se." In his view, one cannot test for the identity of influences exterior to a closed system from within, so questions concerning the identity of a designer fall outside the realm of the concept.

Origins of the concept

For millennia, philosophers have argued that the complexity of nature indicates the existence of a purposeful natural or supernatural designer/creator. The first recorded arguments for a natural designer come from Greek philosophy. The philosophical concept of the "Logos" is typically credited to Heraclitus (c. 535–c.475 BCE), a Pre-Socratic philosopher, and is briefly explained in his extant fragments. Plato (c. 427–c. 347 BCE) posited a natural "demiurge" of supreme wisdom and intelligence as the creator of the cosmos in his work Timaeus. Aristotle (c. 384–322 BCE) also developed the idea of a natural creator of the cosmos, often referred to as the "Prime Mover" in his work Metaphysics. In his de Natura Deorum (On the Nature of the Gods) Cicero (c. 106–c. 43 BCE) stated, "The divine power is to be found in a principle of reason which pervades the whole of nature."

The use of this line of reasoning as applied to a supernatural designer has come to be known as the teleological argument for the existence of God. The most notable forms of this argument were expressed by Thomas Aquinas in his Summa Theologiae (thirteenth century), design being the fifth of Aquinas' five proofs for God's existence, and William Paley in his book Natural Theology (1802), where he uses the watchmaker analogy, which is still used in intelligent design arguments. In the early 19th century such arguments led to the development of what was called Natural theology, the study of biology as a search to understand the "mind of God". This movement fueled the passion for collecting fossils and other biological specimens that ultimately led to Darwin's theory of the origin of species.

Intelligent design in the late 20th century can be seen as a modern reframing of natural theology. As evolutionary theory has expanded to explain more phenomena, so the examples held up as evidence of design have changed, but the essential argument remains the same: complex systems imply a designer. In the past, examples that have been offered included the eye (optical system) and the feathered wing; current examples are mostly biochemical: protein functions, blood clotting, and bacteria flagella (see irreducible complexity).

Intelligent design deliberately does not try to identify or name the specific agent of creation – it merely states that one (or more) must exist. While intelligent design itself does not name the designer, the personal view of many proponents is that the designer is the Christian god. Whether this was a genuine feature of the concept or just a posture taken to avoid alienating those who would separate religion from science-teaching has been a matter of great debate between supporters and critics of intelligent design. The Kitzmiller v. Dover Area School District court ruling held the latter to be the case.

Origins of the term

Though unrelated to the current use of the term, the phrase "intelligent design" can be found in an 1847 issue of Scientific American, in an 1868 geography textbook, and in an address to the 1873 annual meeting of the British Association for the Advancement of Science by Paleyite botanist George James Allman:

No physical hypothesis founded on any indisputable fact has yet explained the origin of the primordial protoplasm, and, above all, of its marvellous properties, which render evolution possible—in heredity and in adaptability, for these properties are the cause and not the effect of evolution. For the cause of this cause we have sought in vain among the physical forces which surround us, until we are at last compelled to rest upon an independent volition, a far-seeing intelligent design.

The phrase was coined again in Humanism, a 1903 book by Ferdinand Canning Scott Schiller: "It will not be possible to rule out the supposition that the process of evolution may be guided by an intelligent design," and was resurrected in the early 1980s by Sir Fred Hoyle as part of his promotion of panspermia.

The term was again resurrected when the Supreme Court of the United States, in the case of Edwards v. Aguillard (1987), ruled that creationism is unconstitutional in public school science curricula. Stephen C. Meyer, cofounder of the Discovery Institute and vice president of the Center for Science and Culture, reports that the term came up in 1988 at a conference he attended in Tacoma, Washington, called Sources of Information Content in DNA. He attributes the phrase to Charles Thaxton, editor of Of Pandas and People. In drafts of the book Of Pandas and People, the word 'creationism' was subsequently changed, almost without exception to intelligent design. The book was published in 1989 and is considered to be the first intelligent design book. The term was promoted more broadly by the retired legal scholar Phillip E. Johnson following his 1991 book Darwin on Trial which advocated redefining science to allow claims of supernatural creation. Johnson, considered the "father" of the intelligent design movement, went on to work with Meyer, becoming the program advisor of the Center for Science and Culture in forming and executing the wedge strategy.

Concepts

The following are summaries of key concepts of intelligent design, followed by summaries of criticisms. Counter-arguments against such criticisms are often proffered by intelligent design proponents, as are counter-counter-arguments by critics, etc.

Irreducible complexity

Main article: Irreducible complexity

In the context of intelligent design, irreducible complexity was put forth by Michael Behe, who defines it as:

..a single system which is composed of several well-matched interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning. (Behe, Molecular Machines: Experimental Support for the Design Inference)

Behe uses the mousetrap as an illustrative example of this concept. A mousetrap consists of several interacting pieces — the base, the catch, the spring, the hammer — all of which must be in place for the mousetrap to work. The removal of any one piece destroys the function of the mousetrap. Intelligent design advocates assert that natural selection could not create irreducibly complex systems, because the selectable function is only present when all parts are assembled. Behe's original examples of alleged irreducibly complex biological mechanisms also include the bacterial flagellum of E. coli, the blood clotting cascade, cilia, and the adaptive immune system.

Critics point out that the irreducible complexity argument assumes that the necessary parts of a system have always been necessary, and therefore could not have been added sequentially. They argue that something which is at first merely advantageous can later become necessary, as other components change. Furthermore, they argue that evolution often proceeds by altering preexisting parts or by removing them from a system, instead of by adding them; this is sometimes referred to as the "scaffolding objection" by an analogy with scaffolding which can support a (irreducibly complex) building until it is complete and able to stand on its own.

Specified complexity

Main article: Specified complexity

The intelligent design concept of specified complexity was developed by mathematician, philosopher, and theologian William Dembski. Dembski states that when something exhibits specified complexity (i.e., is both complex and specified, simultaneously), one can infer that it was produced by an intelligent cause (i.e., that it was designed) rather than being the result of natural processes. He provides the following examples: "A single letter of the alphabet is specified without being complex. A long sentence of random letters is complex without being specified. A Shakespearean sonnet is both complex and specified." He states that details of living things can be similarly characterized, especially the "patterns" of molecular sequences in functional biological molecules such as DNA.

Dembski defines complex specified information as anything with a less than 1 in 10¹⁵⁰ chance of occurring by (natural) chance. Critics say that this renders the argument a tautology: Complex specified information (CSI) cannot occur naturally because Dembski has defined it thus, so the real question becomes whether or not CSI actually exists in nature.

The conceptual soundness of Dembski's specified complexity/CSI argument is strongly disputed by the scientific community. Specified complexity has yet to be shown to have wide applications in other fields as Dembski claims. John Wilkins and Wesley Elsberry characterize Dembski's "explanatory filter" as eliminative, because it eliminates explanations sequentially: first regularity, then chance, finally defaulting to design. They argue that this procedure is flawed as a model for scientific inference because the asymmetric way it treats the different possible explanations renders it prone to making false conclusions of design.

Fine-tuned universe

Main article: Fine-tuned universe

One of the arguments of intelligent design proponents that includes more than just biology is that we live in a fine-tuned universe, with many features that make life possible that cannot be attributed to chance. These features include the values of physical constants, the strength of nuclear forces, and many others. Intelligent design proponent and Center for Science and Culture fellow Guillermo Gonzalez argues that if any of these values were even slightly different, the universe would be dramatically different, with many chemical elements and features of the universe like galaxies being impossible to form. Thus, they argue, an intelligent designer of life was needed to ensure that the requisite features were present to achieve that particular outcome. Other scientists respond that the argument cannot be tested, is not quantifiable, and is poorly supported by existing evidence.

Critics of both intelligent design and the weak form of anthropic principle argue that they are essentially a tautology; in their view, these arguments amount to the claim that life is able to exist because the universe is able to support life. The claim of the improbability of a life-supporting universe has also been criticized as an argument

The designer or designers

Main article: Intelligent designer

Intelligent design arguments are formulated in secular terms and intentionally avoid identifying the intelligent agent they posit. They do not state that God is the designer, but the designer is often implicitly hypothesized to have intervened in a way that only a God could intervene. Intelligent design proponents, such as Dembski, have implied that an alien culture could fulfill these requirements, but since the authoritative description of intelligent design explicitly states that the universe displays features of having been designed, Dembski concludes that "no intelligent agent who is strictly physical could have presided over the origin of the universe or the origin of life." Furthermore, the leading proponents have made statements to their supporters that they believe the designer to be the Christian God, to the exclusion of all other religions, and thus there exists a well-established link to Genesis and Creationism.

Critics argue that existing evidence makes the design hypothesis appear unlikely. For example, Jerry Coyne, of the University of Chicago, asks why a designer would "give us a pathway for making vitamin C, but then destroy it by disabling one of its enzymes" and why he or she wouldn't "stock oceanic islands with reptiles, mammals, amphibians, and freshwater fish, despite the suitability of such islands for these species." Critics of intelligent design point to the fact that "the flora and fauna on those islands resemble that of the nearest mainland, even when the environments are very different" as evidence that species were not placed there by a designer. Behe argued in Darwin's Black Box that we are simply incapable of understanding the designer's motives, so such questions cannot be answered definitively. Odd designs could, for example, "have been placed there by the designer.. for artistic reasons, to show off, for some as-yet undetectable practical purpose, or for some unguessable reason." Coyne responds that in light of the evidence, "either life resulted not from intelligent design, but from evolution; or the intelligent designer is a cosmic prankster who designed everything to make it look as though it had evolved."

Asserting the need for a designer of complexity also raises the question, "what designed the designer?" Intelligent design proponents say that the question is irrelevant to or outside the scope of intelligent design, but Richard Wein counters that the unanswered questions a theory creates "must be balanced against the improvements in our understanding which the explanation provides. Invoking an unexplained being to explain the origin of other beings (ourselves) is little more than question-begging. The new question raised by the explanation is as problematic as the question which the explanation purports to answer." Critics see the claim that the designer need not be explained not as a contribution to knowledge but as a thought-terminating cliché. Answering "what designed the designer?" leads to an infinite regression from which intelligent design proponents can only escape by resorting to religious creationism or logical contradiction.

Intelligent design as a movement

Main article: Intelligent design movement

Phillip E. Johnson, considered the father of the intelligent design movement, stated that the goal of intelligent design is to cast creationism as a scientific concept. All leading intelligent design proponents are fellows or staff of the Discovery Institute and its Center for Science and Culture. Nearly all intelligent design concepts and the associated movement are the products of the Discovery Institute which guides the movement and follows its wedge strategy while conducting its adjunct Teach the Controversy campaign.

Leading intelligent design proponents have made conflicting statements regarding intelligent design. In statements directed at the general public they state that intelligent design is not religious, while they state that intelligent design has its foundation in the Bible when addressing conservative Christian supporters.

Barbara Forrest, an expert who has written extensively on the movement, describes this as being due to the Discovery Institute obfuscating its agenda as a matter of policy. She has written that the movement's "activities betray an aggressive, systematic agenda for promoting not only intelligent design creationism, but the religious world-view that undergirds it."

Religion and leading proponents

Intelligent design arguments are carefully formulated in secular terms and intentionally avoid positing the identity of the designer. Phillip E. Johnson has stated that cultivating ambiguity by employing secular language in arguments which are carefully crafted to avoid overtones of theistic creationism is a necessary first step for ultimately reintroducing the Christian concept of God as the designer. Johnson emphasizes "the first thing that has to be done is to get the Bible out of the discussion" and that "after we have separated materialist prejudice from scientific fact .. only then can 'biblical issues' be discussed." Johnson explicitly calls for intelligent design proponents to obfuscate their religious motivations so as to avoid having intelligent design identified "as just another way of packaging the Christian evangelical message." The principal intelligent design advocates, including Michael Behe, William Dembski, Jonathan Wells (actually a member of the Unification Church, headed by Reverend Moon), and Stephen C. Meyer, are Christians and have stated that in their view the designer of life is God. The vast majority of leading intelligent design proponents are evangelical Protestants.

The conflicting claims made by leading intelligent design advocates as to whether or not intelligent design is rooted in religious conviction are the result of their strategy. For example, William Dembski in his book The Design Inference lists a god or an "alien life force" as two possible options for the identity of the designer. However, in his book Intelligent Design: the Bridge Between Science and Theology Dembski states that "Christ is indispensable to any scientific theory, even if its practitioners don't have a clue about him. The pragmatics of a scientific theory can, to be sure, be pursued without recourse to Christ. But the conceptual soundness of the theory can in the end only be located in Christ." Dembski also stated "ID is part of God's general revelation.." "Not only does intelligent design rid us of this ideology (materialism), which suffocates the human spirit, but, in my personal experience, I've found that it opens the path for people to come to Christ."

The two leading intelligent design proponents, Phillip Johnson and William Dembski, cite the Bible's Book of John as the foundation of intelligent design. Barbara Forrest contends that such statements reveal that leading proponents see intelligent design as essentially religious in nature, as opposed to a scientific concept that has implications with which their personal religious beliefs happen to coincide.

Intelligent design controversy

A key strategy of the intelligent design movement is in convincing the general public that there is a debate among scientists about whether life evolved, seeking to convince the public, politicians, and cultural leaders that schools should "teach the controversy." However, there is no such controversy; the scientific consensus is that life evolved.

The intelligent design controversy centers on three issues:

1. Whether the definition of science is broad enough to allow for theories of origins which incorporate the acts of an intelligent designer
2. Whether the evidence supports such theories
3. Whether the teaching of such theories is appropriate and legal in public education

Natural science uses the scientific method to create a posteriori knowledge based on observation alone (sometimes called empirical science). Intelligent design proponents seek to change this definition by eliminating "methodological naturalism" from science and replacing it with what the leader of the intelligent design movement, Phillip E. Johnson, calls "theistic realism", and what critics call "methodological supernaturalism," which means belief in a transcendent, non-natural dimension of reality inhabited by a transcendent, non-natural deity. Intelligent design proponents argue that naturalistic explanations fail to explain certain phenomena, and that supernatural explanations provide a very simple and intuitive explanation for the origins of life and the universe. Proponents say that evidence exists in the forms of irreducible complexity and specified complexity that cannot be explained by natural processes.

Supporters also hold that religious neutrality requires the teaching of both evolution and intelligent design in schools, saying that teaching only evolution unfairly discriminates against those holding creationist beliefs. Teaching both, intelligent design supporters argue, allows for the possibility of religious belief, without causing the state to actually promote such beliefs. Many intelligent design followers believe that "Scientism" is itself a religion that promotes secularism and materialism in an attempt to erase theism from public life, and view their work in the promotion of intelligent design as a way to return religion to a central role in education and other public spheres. Some allege that this larger debate is often the subtext for arguments made over intelligent design, though others note that intelligent design serves as an effective proxy for the religious beliefs of prominent intelligent design proponents in their efforts to advance their religious point of view within society.

According to critics, intelligent design has not presented a credible scientific case, and is an attempt to teach religion in public schools, which the United States Constitution forbids under the Establishment Clause. They allege that intelligent design has substituted public support for scientific research. Furthermore, if one were to take the proponents of "equal time for all theories" at their word, there would be no logical limit to the number of potential "theories" to be taught in the public school system, including admittedly silly ones like the Flying Spaghetti Monster "theory." There are innumerable mutually-incompatible supernatural explanations for complexity, and intelligent design does not provide a mechanism for discriminating among them. Furthermore, intelligent design is neither observable nor repeatable, which critics argue violates the scientific requirement of falsifiability. Indeed, intelligent design proponent Michael Behe concedes "You can't prove intelligent design by experiment."

Even though evolution theory does not explain abiogenesis, the generation of life from nonliving matter, intelligent design proponents cannot infer that an intelligent designer is behind the part of the process that is not understood scientifically, since they have not shown that anything supernatural has occurred. The inference that an intelligent designer (a god or an alien life force) created life on Earth has been compared to the a priori claim that aliens helped the ancient Egyptians build the pyramids. In both cases, the effect of this outside intelligence is not repeatable, observable, or falsifiable, and it violates Occam's Razor. From a strictly empirical standpoint, one may list what is known about Egyptian construction techniques, but must admit ignorance about exactly how the Egyptians built the pyramids.

Many religious people do not condone the teaching of what is considered unscientific or questionable material, and support theistic evolution which does not conflict with scientific theories. An example is Cardinal Schönborn who sees "purpose and design in the natural world" yet has "no difficulty.. with the theory of evolution the borders of scientific theory".

Can intelligent design be defined as science?

The scientific method is based on an approach known as methodological naturalism to study and explain the natural world, without assuming the existence or nonexistence of the supernatural. Intelligent design proponents have often said that their position is not only scientific, but that it is even more scientific than evolution, and want a redefinition of science to allow "non-naturalistic theories such as intelligent design". This presents a demarcation problem, which in the philosophy of science is about how and where to draw the lines around science. For a theory to qualify as scientific it must be:

• Consistent (internally and externally)
• Parsimonious (sparing in proposed entities or explanations, see Occam's Razor)
• Useful (describes and explains observed phenomena)
• Empirically testable & falsifiable (see Falsifiability)
• Based upon multiple observations, often in the form of controlled, repeated experiments
• Correctable & dynamic (changes are made as new data are discovered)
• Progressive (achieves all that previous theories have and more)
• Provisional or tentative (admits that it might not be correct rather than asserting certainty)

For any theory, hypothesis or conjecture to be considered scientific, it must meet most, but ideally all, of the above criteria. The fewer criteria that are met, the less scientific it is; and if it meets only a couple or none at all, then it cannot be treated as scientific in any meaningful sense of the word. Typical objections to defining intelligent design as science are that it lacks consistency, violates the principle of parsimony, is not falsifiable, is not empirically testable, and is not correctable, dynamic, tentative or progressive.

In light of its apparent failure to adhere to scientific standards, in September 2005 38 Nobel laureates issued a statement saying "intelligent design is fundamentally unscientific; it cannot be tested as scientific theory because its central conclusion is based on belief in the intervention of a supernatural agent." And in October 2005 a coalition representing more than 70,000 Australian scientists and science teachers issued a statement saying "intelligent design is not science" and called on "all schools not to teach Intelligent Design (ID) as science, because

Intelligent design critics also say that the intelligent design doctrine does not meet the criteria for scientific evidence used by most courts, the Daubert Standard. The Daubert Standard governs which evidence can be considered scientific in United States federal courts and most state courts. The four Daubert criteria are:

• The theoretical underpinnings of the methods must yield testable predictions by means of which the theory could be falsified.
• The methods should preferably be published in a peer-reviewed journal.
• There should be a known rate of error that can be used in evaluating the results.
• The methods should be generally accepted within the relevant scientific community.

In deciding Kitzmiller v. Dover Area School District on December 20, 2005, Judge John E. Jones III ruled that "we have addressed the seminal question of whether ID is science. We have concluded that it is not, and moreover that ID cannot uncouple itself from its creationist, and thus religious, antecedents."

Peer review

The failure to follow the procedures of scientific discourse, and the failure to submit work to the scientific community which withstands scrutiny, have weighed very heavily against intelligent design being considered valid science. To date, the intelligent design movement has yet to have an article published in a peer-reviewed scientific journal.

Intelligent design, by appealing to a supernatural agent, conflicts with the naturalistic orientation of science. Dembski, Behe and other intelligent design proponents claim bias by the scientific community is to blame for the failure of their research to be published. Intelligent design proponents believe that the merit of their writings is rejected for not conforming to purely naturalistic non-supernatural mechanisms rather than on grounds of their research not being up to "journal standards". This claim is described as a conspiracy theory by some scientists. The issue that the scientific method is based on methodological naturalism and so does not accept supernatural explanations became a sticking point for intelligent design proponents in the 1990's, and is addressed in "The Wedge" strategy as an aspect of science that must be challenged before intelligent design could be accepted by the broader scientific community.

The debate over whether intelligent design produces new research, as any scientific field must, and has legitimately attempted to publish this research, is extremely heated. Both critics and advocates point to numerous examples to make their case. For instance, the Templeton Foundation, a former funder of the Discovery Institute and a major supporter of projects seeking to reconcile science and religion, says that they asked intelligent design proponents to submit proposals for actual research, but none were ever submitted. Charles L. Harper Jr., foundation vice president, said that "From the point of view of rigor and intellectual seriousness, the intelligent design people don't come out very well in our world of scientific review." At the Kitzmiller trial the judge found that intelligent design features no scientific research or testing.

The only article published in a peer-reviewed scientific journal that made a case for intelligent design was quickly withdrawn by the publisher for having circumvented the journal's peer-review standards. Written by the Discovery Institute's Center for Science & Culture Director Stephen C. Meyer, it appeared in the peer-reviewed journal Proceedings of the Biological Society of Washington in August 2004. The article was literature review, which means that it did not present any new research, but rather culled quotes and claims from other papers to argue that the Cambrian explosion could not have happened by naturalistic processes. The choice of venue for this article was also considered problematic, because it was so outside the normal subject matter. (see Sternberg peer review controversy)

In the Kitzmiller trial, intelligent design proponents referenced just one paper, on simulation modeling of evolution by Behe and Snoke, that mentioned neither irreducible complexity nor intelligent design and that Behe admitted did not rule out known evolutionary mechanisms. Dembski has written that "Perhaps the best reason is that intelligent design has yet to establish itself as a thriving scientific research program." In a 2001 interview Dembski said that he stopped submitting to peer-reviewed journals because of their slow time-to-print and that he makes more money from publishing books.

In sworn testimony at the Kitzmiller trial Behe stated that "there are no peer reviewed articles by anyone advocating for intelligent design supported by pertinent experiments or calculations which provide detailed rigorous accounts of how intelligent design of any biological system occurred." Further, as summarized by the judge, Behe conceded that there are no peer-reviewed articles supporting his claims of intelligent design or irreducible complexity. Despite this, the Discovery Institute continues to claim that a number of intelligent design articles have been published in peer reviewed journals, including in their list the two articles mentioned above. Critics, largely members of the scientific community, reject this claim, pointing out that no established scientific journal has yet published an intelligent design article, and that intelligent design proponents have set up their own journals with "peer review" that consists entirely of intelligent design supporters which lack rigor.

Intelligence as an observable quality

The phrase intelligent design makes use of an assumption of the quality of an observable intelligence, a concept that has no scientific consensus definition. William Dembski, for example, has written that "Intelligence leaves behind a characteristic signature." Such characteristics of intelligent agency are assumed to be observable without intelligent design specifying what the criteria for the measurement of intelligence should be. Dembski, instead, asserts that "in special sciences ranging from forensics to archaeology to SETI (the Search for Extraterrestrial Intelligence), appeal to a designing intelligence is indispensable." How this appeal is made and what this implies as to the definition of intelligence are topics left largely unaddressed. Seth Shostak, a researcher with the SETI Institute, refutes Dembski's claim, saying that intelligent design advocates base their inference on complexity — the argument being that some biological systems are too complex to have been made by natural processes — while SETI researchers are looking primarily for artificiality.

Critics say that the design detection methods proposed by proponents are radically different from conventional design detection, undermining the key elements that make it possible as legitimate science. Intelligent design proponents, they say, are proposing both searching for a designer without knowing anything about that designer's abilities, parameters, or intentions (which scientists do know when searching for the results of human intelligence) as well as denying the very distinction between natural/artificial design that allows scientists to compare complex designed artifacts against the background of the sorts of complexity found in nature.

As a means of criticism, certain skeptics have pointed to a challenge of intelligent design derived from the study of artificial intelligence. The criticism is a counter to intelligent design claims about what makes a design intelligent, namely that "no preprogrammed device can be truly intelligent, that intelligence is irreducible to natural processes." In particular, while there is an implicit assumption that supposed "intelligence" or creativity of a computer program was determined by the capabilities given to it by the computer programmer, artificial intelligence need not be bound to an inflexible system of rules. Rather, if a computer program can access randomness as a function, this effectively allows for a flexible, creative, and adaptive intelligence. Evolutionary algorithms, a subfield of machine learning (itself a subfield of artificial intelligence), have been used to mathematically demonstrate that randomness and selection can be used to "evolve" complex, highly adapted structures that are not explicitly designed by a programmer. Evolutionary algorithms use the Darwinian metaphor of random mutation, selection and the survival of the fittest to solve diverse mathematical and scientific problems that are usually not solvable using conventional methods. Furthermore, forays into such areas as quantum computing seem to indicate that real probabilistic functions may be available in the future. Intelligence derived from randomness is essentially indistinguishable from the "innate" intelligence associated with biological organisms and poses a challenge to the intelligent design conception of whence intelligence itself is derived (namely from a designer). Cognitive science continues to investigate the nature of intelligence to that end, but the intelligent design community for the most part seems to be content to rely on the assumption that intelligence is readily apparent as a fundamental and basic property of complex systems.

Arguments from ignorance

Eugenie Scott, along with Glenn Branch and other critics, has argued that many points raised by intelligent design proponents are arguments from ignorance. In the argument from ignorance, one claims that the lack of evidence for one view is evidence for another view. Scott and Branch say that intelligent design is an argument from ignorance because it relies upon a lack of knowledge for its conclusion: lacking a natural explanation, we assume intelligent cause. They contend most scientists would reply that unexplained is not unexplainable, and that "we don't know yet" is a more appropriate response than invoking a cause outside of science. Particularly, Michael Behe's demands for ever more detailed explanations of the historical evolution of molecular systems seem to assume a dichotomy where either evolution or design is the proper explanation, and any perceived failure of evolution becomes a victory for design. In scientific terms, "absence of evidence is not evidence of absence" for naturalistic explanations of observed traits of living organisms. Scott and Branch also contend that the supposedly novel contributions proposed by intelligent design proponents have not served as the basis for any productive scientific research.

Intelligent design has also been characterized as a "God of the gaps" argument, which has the following form:

• There is a gap in scientific knowledge.
• The gap is filled with acts of God (or Intelligent designer) and therefore proves the existence of God (or Intelligent designer).

A God-of-the-Gaps argument is the theological version of an argument from ignorance. The key feature of this type of argument is that it merely answers outstanding questions with explanations (often supernatural) that are unverifiable and ultimately themselves subject to unanswerable questions.

Improbable versus impossible events

In "Innumeracy: Mathematical Illiteracy and its Consequences", John Allen Paulos suggests that the apparent improbability of a given scenario cannot necessarily be taken as an indication that this scenario is therefore more unlikely than any other potential one: "Rarity by itself shouldn't necessarily be evidence of anything. When one is dealt a bridge hand of thirteen cards, the probability of being dealt that particular hand is less than one in 600 billion. Still, it would be absurd for someone to be dealt a hand, examine it carefully, calculate that the probability of getting it is less than one in 600 billion, and then conclude that he must not have been dealt that very hand because it is so very improbable."

This argument can be seen as a rebuttal to those advocates of intelligent design who claim that only a sentient creator could have arranged the universe in such a way as to be conducive to life (see for example specified complexity arguments or fine-tuning arguments). In this context, the probability of life "evolving" rather than having been "created" may appear unlikely at first sight, but the evidence that this is the case could be argued to be so widespread, deep, and heavily scrutinized that it would be illogical to conclude that any other (and arguably less scientifically compelling) hypothesis should take its place as the primary theory.

See also

• Argument from evolution
• Argument from poor design
• Clockmaker hypothesis
• Cosmological argument
• Creation science
• Creationism
• Flying Spaghetti Monsterism
• Evolutionary algorithm

• Kitzmiller v. Dover Area School District summing up (introduction), 2: context, 3: disclaimer, 4: whether ID is science, 5: promoting religion, 6: curriculum, conclusion.

Notes and references

1.   Discovery Institute, Center for Science and Culture. Questions about Intelligent Design: What is the theory of intelligent design? "The theory of intelligent design holds that certain features of the universe and of living things are best explained by an intelligent cause, not an undirected process such as natural selection. "
2.   "Q. Has the Discovery Institute been a leader in the intelligent design movement? A. Yes, the Discovery Institute's Center for Science and Culture. Q. And are almost all of the individuals who are involved with the intelligent design movement associated with the Discovery Institute? A. All of the leaders are, yes." Barbara Forrest, 2005, testifying in the Kitzmiller v. Dover Area School District trial.
3.   Stephen C. Meyer, 2005. The Scientific Status of Intelligent Design: The Methodological Equivalence of Naturalistic and Non-Naturalistic Origins Theories. Ignatius Press. . See also Darwin's Black Box.
4.   See Kitzmiller v. Dover page 83. The Discovery Institute's has been signed by about 500 scientists. The AAAS, the largest association of scientists in the U.S., has 120,000 members, and . More than 70,000 Australian scientists and educators . on the status intelligent design and other forms of creationism.
5.   H. Allen Orr. Annals of Science. New Yorker May 2005. Also, Robert T. Pennock Tower of Babel: The Evidence Against the New Creationism ISBN 026216180X, ISBN 0262661659.
6.   "" In Science and Creationism: A View from the National Academy of Sciences, Second Edition National Academy of Sciences, 1999
7.   "ID's rejection of naturalism in any form logically entails its appeal to the only alternative, supernaturalism, as a putatively scientific explanation for natural phenomena. This makes ID a religious belief. In addition, my research reveals that ID is not science, but the newest variant of traditional American creationism. With only a few exceptions, it continues the usual complaints of creationists against the theory of evolution and comprises virtually all the elements of traditional creationism." Barbara Forrest April 2005 Expert Witness Report. Kitzmiller v. Dover Area School District.
8.   Dembski. The Design Revolution. pg. 27 2004
9.   Heraclitus of Ephesus, The G.W.T. Patrick translation
10.  
11.   Thomas Aquinas, 1265-1272. Summa Theologiae. "" In faithnet.org.uk, He framed the argument as a syllogism: Wherever complex design exists, there must have been a designer; nature is complex; therefore nature must have had an intelligent designer.
12.   Elements of Physical Geography, by John Brocklesby
13.   'The British Association', The Times, Saturday, 20 September, 1873; pg. 10; col A.
14.   'Evolution according to Hoyle: Survivors of disaster in an earlier world', By Nicholas Timmins, The Times, Wednesday, 13 January, 1982; pg. 22; Issue 61130; col F.
15.   William Safire. 'On Language: Neo-Creo.' The New York Times. August 21, 2005.
16.  
17.   Irreducible complexity of these examples is disputed, see Kitzmiller p 76-78, or see part 39:30--51:20 of this
18.   Dembksi. , p. 47
19.   Nowak quoted. Claudia Wallis. Evolution Wars. Time Magazine, 15 August 2005 edition, page 32
20.   John S. Wilkins and Wesley R. Elsberry, "The Advantages of Theft over Toil: The Design Inference and Arguing from Ignorance." Biology and Philosophy 16: 711-724 (2001).
21.   Guillermo Gonzalez, The Privileged Planet, ISBN 0895260654
22.   .
23.   "The theory of Intelligent Design holds that certain features of the universe and of living things are best explained by an intelligent cause, not an undirected process such as natural selection." Discovery Institute. What is Intelligent Design?
24.   Dembski. The Act of Creation: Bridging Transcendence and Immanence
25.   Jerry Coyne, "The Case Against Intelligent Design," The New Republic, August 22 2005.
26.  "One need not fully understand the origin or identity of the designer to determine that an object was designed. Thus, this question is essentially irrelevant to intelligent design theory, which merely seeks to detect if an object was designed.. Intelligent design theory cannot address the identity or origin of the designer--it is a philosophical / religious question that lies outside the domain of scientific inquiry. Christianity postulates the religious answer to this question that the designer is God who by definition is eternally existent and has no origin. There is no logical philosophical impossibility with this being the case (akin to Aristotle's 'unmoved mover') as a religious answer to the origin of the designer.." FAQ: Who designed the designer? IDEA
27.   Richard Wein. 2002.Not a Free Lunch But a Box of Chocolates
28.   Phillip Johnson: "Our strategy has been to change the subject a bit so that we can get the issue of Intelligent Design, which really means the reality of God, before the academic world and into the schools." Johnson 2004. Christianity.ca. . "This isn't really, and never has been a debate about science. It's about religion and philosophy." Johnson 1996. World Magazine. . "So the question is: "How to win?" That's when I began to develop what you now see full-fledged in the "wedge" strategy: "Stick with the most important thing"—the mechanism and the building up of information. Get the Bible and the Book of Genesis out of the debate because you do not want to raise the so-called Bible-science dichotomy. Phrase the argument in such a way that you can get it heard in the secular academy and in a way that tends to unify the religious dissenters. That means concentrating on, "Do you need a Creator to do the creating, or can nature do it on its own?" and refusing to get sidetracked onto other issues, which people are always trying to do." Johnson 2000. Touchstone magazine. "I have built an intellectual movement in the universities and churches that we call The Wedge, which is devoted to scholarship and writing that furthers this program of questioning the materialistic basis of science.".."Now the way that I see the logic of our movement going is like this. The first thing you understand is that the Darwinian theory isn't true. It's falsified by all of the evidence and the logic is terrible. When you realize that, the next question that occurs to you is, well, where might you get the truth?".."I start with John 1:1. In the beginning was the word. In the beginning was intelligence, purpose, and wisdom. The Bible had that right. And the materialist scientists are deluding themselves." Johnson 1999. Reclaiming America for Christ Conference.
29.  
30.   "Now the way that I see the logic of our movement going is like this. The first thing you understand is that the Darwinian theory isn't true. It's falsified by all of the evidence and the logic is terrible. When you realize that, the next question that occurs to you is, well, where might you get the truth? .. I start with John 1:1. 'In the beginning was the word..' In the beginning was intelligence, purpose, and wisdom. The Bible had that right." Johnson, 1999. Reclaiming America for Christ Conference.
31.   Barbara Forrest, 2001. "." from Intelligent Design Creationism and Its Critics. MIT Press.
32.   "..the first thing that has to be done is to get the Bible out of the discussion. ..This is not to say that the biblical issues are unimportant; the point is rather that the time to address them will be after we have separated materialist prejudice from scientific fact." Phillip Johnson. . July/August 1999.
33.   "Intelligent Design is an intellectual movement, and the Wedge strategy stops working when we are seen as just another way of packaging the Christian evangelical message. .. The evangelists do what they do very well, and I hope our work opens up for them some doors that have been closed." Phillip Johnson. "Keeping the Darwinists Honest," an interview with Phillip Johnson. In Citizen Magazine. April 1999.
34.   William Dembski, 1998. The Design Inference. Cambridge University Press
35.   Dembski. 1999. Intelligent Design; the Bridge Between Science and Theology. "Christ is indispensable to any scientific theory, even if its practitioners don't have a clue about him. The pragmatics of a scientific theory can, to be sure, be pursued without recourse to Christ. But the conceptual soundness of the theory can in the end only be located in Christ." p. 210
36.   Dembski. 2005. Intelligent Design's Contribution to the Debate Over Evolution: A Reply to Henry Morris.
37.   "Intelligent design is just the Logos theology of John's Gospel restated in the idiom of information theory," William Dembski. Touchstone Magazine. Volume 12, Issue4. July/August, 1999
38.   "Now the way that I see the logic of our movement going is like this. The first thing you understand is that the Darwinian theory isn't true. It's falsified by all of the evidence and the logic is terrible. When you realize that, the next question that occurs to you is, well, where might you get the truth? When I preach from the Bible, as I often do at churches and on Sundays, I don't start with Genesis. I start with John 1:1. 'In the beginning was the word..' In the beginning was intelligence, purpose, and wisdom. The Bible had that right. And the materialist scientists are deluding themselves." Phillip E. Johnson. 1999 Reclaiming America for Christ Conference" 1999. at
39.   "What I am talking about is the essence of intelligent design, and the essence of it is theistic realism as defined by Professor Johnson. Now that stands on its own quite apart from what their motives are. I'm also talking about the definition of intelligent design by Dr. Dembski as the Logos theology of John's Gospel. That stands on its own." .. "Intelligent design, as it is understood by the proponents that we are discussing today, does involve a supernatural creator, and that is my objection. And I am objecting to it as they have defined it, as Professor Johnson has defined intelligent design, and as Dr. Dembski has defined intelligent design. And both of those are basically religious. They involve the supernatural." Barbara Forrest. Expert Testimony. Kitzmiller v. Dover Area School District trial transcript, Day 6 (October 5)
40.   Seattle Times, March 31, 2005.
41.  
42.   Barbara Forrest, 2000. "." In Philo, Vol. 3, No. 2 (Fall-Winter 2000), pp. 7-29.
43.   Phillip E. Johnson in his book "Reason in the Balance: The Case Against Naturalism in Science, Law and Education" (InterVarsity Press, 1995), positions himself as a "theistic realist" against "methodological naturalism."
44.   "My colleagues and I speak of 'theistic realism'-- or sometimes, 'mere creation' -- as the defining concept of our movement. This means that we affirm that God is objectively real as Creator, and that the reality of God is tangibly recorded in evidence accessible to science, particularly in biology." Phillip Johnson.
45.   "We are taking an intuition most people have and making it a scientific and academic enterprise," Johnson said. In challenging Darwinism with a God-friendly alternative theory, the professor, who is a Presbyterian, added, "We are removing the most important cultural roadblock to accepting the role of God as creator." Phillip E. Johnson. 2001. Enlisting Science to Find the Fingerprints of a Creator: Believers in 'intelligent design' try to redirect evolution disputes along intellectual lines. By Teresa Watanabe. Los Angeles Times (Sunday Front page) March 25, 2001.
46.   Joel Belz, 1996. World Magazine.
47.   "Our strategy has been to change the subject a bit so that we can get the issue of Intelligent Design, which really means the reality of God, before the academic world and into the schools." Phillip E. Johnson. January 10 2003 on American Family Radio In www.christianity.ca
48.   Jon Buell & Virginia Hearn (eds), 1992. "" (PDF)
49.   Karl Giberson . Science & Theology News, December 5, 2005
50.   Claudia Wallis. Evolution Wars. Time Magazine, 15 August 2005 edition, page 32
51.   William Dembski in The Design Inference" (see further reading) cited extraterrestrials as a possible designer .
52.   Michael J. Murray, n.d. " (PDF)
53.   William Dembski defends Intelligent Design from "silly claim" that "ancient technologies could not have built the pyramids, so goblins must have done it."
54.   Stephen C. Meyer, 2005. The Scientific Status of Intelligent Design: The Methodological Equivalence of Naturalistic and Non-Naturalistic Origins Theories
55.   Intelligent design is generally only internally consistent and logical within the framework in which it operates. Criticisms are that this framework has at its foundation an unsupported, unjustified assumption: That complexity and improbability must entail design, but the identity and characteristics of the designer is not identified or quantified, nor need they be. The framework of Intelligent Design, because it rests on a unquantifiable and unverifiable assertion, has no defined boundaries except that complexity and improbability require design, and the designer need not be constrained by the laws of physics.
56.   Intelligent design fails to pass Occam's razor. Adding entities (an intelligent agent, a designer) to the equation is not strictly necessary to explain events.
57.   The designer is not falsifiable, since its existence is typically asserted without sufficient conditions to allow a falsifying observation. The designer being beyond the realm of the observable, claims about its existence can neither be supported nor undermined by observation, hence making Intelligent Design and the argument from design analytic a posteriori arguments.
58.   That Intelligent Design is not empirically testable stems from the fact that Intelligent Design violates a basic premise of science, naturalism.
59.   Intelligent design professes to offer an answer that does not need to be defined or explained, the intelligent agent, designer. By asserting a conclusion that need not be accounted for, the designer, no further explanation is necessary to sustain it, and objections raised to those who accept it make little headway. Thus Intelligent Design is not a provisional assessment of data which can change when new information is discovered. Once it is claimed that a conclusion that need not be accounted for has been established, there is simply no possibility of future correction. The idea of the progressive growth of scientific ideas is required to explain previous data and any previously unexplainable data.
60.   The Elie Wiesel Foundation for Humanity Nobel Laureats Initiative. Intelligent design cannot be tested as a scientific theory "because its central conclusion is based on belief in the intervention of a supernatural agent."
61.   Intelligent Design is not Science - Scientists and teachers speak out. Faculty of Science, University of New South Wales. 20 October, 2005.
62.  
63.   Laurie Goodstein. Intelligent Design Might Be Meeting Its Maker December 4, 2004. The New York Times.
64.   William A. Dembski From Dembski's designinference.com
65.   Beth McMurtrie, 2001. "." The Chronicle Of Higher Education.
66.   Kitzmiller v. Dover Area School District, October 19, 2005, AM session
67.   Discovery Institute.
68.   William Dembski. Intelligent Design? a special report reprinted from Natural History magazine April 2002.
69.   "In fact, the signals actually sought by today’s SETI searches are not complex, as the ID advocates assume. .. If SETI were to announce that we’re not alone because it had detected a signal, it would be on the basis of artificiality." Shostak. SETI and Intelligent Design, space.com
70.   Taner Edis. Darwin in Mind: Intelligent Design Meets Artificial Intelligence. Skeptical Inquirer Magazine, March/April 2001 issue.
71.   Eugenie C. Scott and Glenn Branch, , National Center for Science Education website, September 10, 2002.
72.   ibid.

Non-ID perspectives

• Article analyzing the main arguments put forward by ID Theory.
• special feature in the Natural History Magazine
• Second Edition (1999)
• (Archive of a UseNet discussion group)
• by the Kitzmiller v. Dover Area School District judge
• , JURIST
• Elliot Sober, 2004.

Media articles

• (Columbia Journalism Review)
• (Associated Press)
• (Christian Science Monitor)
• (The New Yorker)
• (The New York Times)
• (NPR)
• (Time)
• "Justice Talking" debate recorded 19-Apr-2005 Disseny intel·ligent

Intelligent design Diseño inteligente Inteligenta Dezajno Dessein intelligent 지적 설계 Intelligent Design תכנון תבוני Intelligens tervezés Intelligent design インテリジェント・デザイン Intelligent design Teoria inteligentnego projektu Älykäs suunnittelu Intelligent design Akıllı tasarım 智能设计论