[bluejay]

If things are purely random, then it would take an impossible amount of time. Once a selection criteria is introduced, the time required is dramatically reduced.

I don't understand. How does natural selection reduce the time required for random mutations to occur and to be incorporated into the genome? Assuming it does reduce the time, how much time is required? One of the problems I have with evolution as a doctrine is a surprising lack of calculations that demonstrate that given the rate of mutation, the impact of natural selection, and the amount of time available the odds of life developing is X.

[The Scourge of Yazid]

Charles Darwin:

Jean Baptiste Lamarck is my bitch! Now get my evolved ass a ham sammich ye stupid gits!

[Junior]

How does natural selection reduce the time required for random mutations to occur and to be incorporated into the genome?

Individuals without the mutation will be less likely to procreate. Those with the gene will then pass it on to a higher percentage of offspring than those without. Eventually, the mutation spreads throughout the population.

[Right Wing Professor]

One of the problems I have with evolution as a doctrine is a surprising lack of calculations that demonstrate that given the rate of mutation, the impact of natural selection, and the amount of time available the odds of life developing is X.

Such calculations are way beyond our current capabilities; and the simplistic numbers you see from creationists simply reflect their failure to appreciate the complexity of the problem.