Orr_Allen Quotes (1 quote)
To paraphrase Dr. Orr: Darwinian evolution can easily produce irreducible complexity: all that's required is that parts that were once just favorable become, because of later changes, essential.
In 'Is the Complement System Irreducibly Complex?' on The TalkOrigins Archive website. Coon summarizes H. Allen Orr, who wrote: An irreducibly complex system can be built gradually by adding parts that, while initially just advantageous, become-because of later changes-essential. The logic is very simple. Some part (A) initially does some job (and not very well, perhaps). Another part (B) later gets added because it helps A. This new part isn't essential, it merely improves things. But later on, A (or something else) may change in such a way that B now becomes indispensable. This process continues as further parts get folded into the system. And at the end of the day, many parts may all be required. In H. Allen Orr, 'Darvin v. Intelligent Design (Again)' in Boston Review (Dec 1996/Jan1997)