[Mr Rogers]

"Any modification of an organ that gives it a reproductive advantage will be favored."

But that is the problem - until the new organ exists as a whole, it has strong reporductive disadvantage - and yet, it is supposed to survive for millions of years until the change is complete.

In order to make the jump, it would have to 'look forward'.

Think of the switch between carburators and fuel injection. Seeing the complete fuel injection, we can see selective advantage. However, the moment you tamper with the carburator, the car ceases to function. A simplistic approach, but I'm running out of time for posting - my significant other wants to go shopping.

;>(

[CarolinaGuitarman]

"But that is the problem - until the new organ exists as a whole, it has strong reporductive disadvantage - and yet, it is supposed to survive for millions of years until the change is complete."

I guess you didn't read what I said. Organs don't evolve into finished products. There is no finished *eye* our eyes were evolving into. At each step along the way, the modification gave our ancestors a reproductive advantage, or else it would have been culled in short order. Our eyes are far from perfect, and the idea they were designed ex nihilo by a designer leaves one to question the capabilities or the morality of this alleged designer.

"Think of the switch between carburators and fuel injection. Seeing the complete fuel injection, we can see selective advantage. However, the moment you tamper with the carburator, the car ceases to function. A simplistic approach, but I'm running out of time for posting - my significant other wants to go shopping."

A car is not an imperfectly self-replicating organism. There is no useful analogy between the evolution of cars and the evolution of life.

And for Pete's sake, don't leave your wife waiting! This isn't as important. :)