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'''Irreducible Complexity''' is the aspect of a system which prevents it from operating at all, unless all of its parts are in place and working properly.  

'''Irreducible Complexity''' an argument used to support intelligent design that claims that all parts of a system are required for it to work properly, and the removal of any part. The idea of irreducible complexity is that some systems are so complex that the removal or alteration of any part would prevent the system from functioning. Proponents of [[intelligent design]] claim that irreducible complexity is evidence that the system probably was designed by an intelligent agent of some sort.

 

The idea of irreducible complexity is that some systems are so complex that the removal or alteration of any part would prevent the system from functioning. Proponents of [[intelligent design]] claim that irreducible complexity is evidence that the system probably was designed by an intelligent agent of some sort.

For example, a car will not go without an engine. Indeed, the engine will not run without fuel and a starter motor. The designer must ensure that all parts work together to produce the intended function.

For example, a car will not go without an engine. Indeed, the engine will not run without fuel and a starter motor. The designer must ensure that all parts work together to produce the intended function.

"A system performing a given basic function is irreducibly complex if it includes a set of well-matched, mutually interacting, non-arbitrarily individuated parts such that each part in the set is indispensable to maintaining the system's basic, and therefore original, function. The set of these indispensable parts is known as the irreducible core of the system. <ref>William Dembski, ''No Free Lunch'',(2001), p. 285. ISBN 0742512975</ref>

"A system performing a given basic function is irreducibly complex if it includes a set of well-matched, mutually interacting, non-arbitrarily individuated parts such that each part in the set is indispensable to maintaining the system's basic, and therefore original, function. The set of these indispensable parts is known as the irreducible core of the system. <ref>William Dembski, ''No Free Lunch'',(2001), p. 285. ISBN 0742512975</ref>

Irreducible complexity has been used by astronomer [[Fred Hoyle]] and biochemistry professor [[Michael Behe]] to argue against the idea of "[[evolution through natural selection]]". Hoyle compares the probability of all the parts of a [[cell]] coming together through natural forces to the probability of a cyclone in a [[hangar]] assembling all the parts of a [[Boeing 747]] aircraft.

However, organisms that appear to have no unnecessary parts could have been built up from simpler parts that are no longer necessary. Irreducible complexity has been used by astronomer [[Fred Hoyle]] and biochemistry professor [[Michael Behe]] to argue against the idea of "[[evolution through natural selection]]". Hoyle compares the probability of all the parts of a [[cell]] coming together through natural forces to the probability of a cyclone in a [[hangar]] assembling all the parts of a [[Boeing 747]] aircraft.

William Dembski wrote the following in a essay:  

William Dembski wrote the following in a essay: