Yes. This is precisely what Robert Koons is getting at when he says,mgb wrote: The question is, how do different body parts all evolve together if the must all evolve by chance events? If part A and part B evolve together and get all the required mutations to integrate with each other the chances are multiplied together.
If there 1 chance in 1000 for A getting a good mutation and 1 chance in 1000 for B then there is only 1 chance in 1,000,000 for them getting what they need simultaneously.
If you are talking about A, B, C, and D the chances are 1 in 1000^4 = 1 in 1,000,000,000,000
That is the problem. Everything is happening at the same time and the chances of this simultaneity are enormously small.
"These pathways must be possible, not only in the sense of involving no violation of physical or chemical laws, but also in the sense that every step in the path can be assigned an estimated probability that is sufficiently high for the joint probability of the entire pathway to be consistent with a reasonable belief that such a thing might actually have happened."
With each component required to have evolved by natural selection for the specifiably complex system to function, the joint probability of the whole system evolving by natural selection diminishes exponentially.