Tuesday, February 21, 2012

evolution's "circular reasoning"

browsing various areas, I've noticed that one argument that people often make against the theory of evolution is circular reasoning in the principle of "survival of the fittest." the argument generally goes like this:

the theory of evolution states that the fittest animals will survive, and that those that survive are the fittest. this is circular reasoning, and thus evolution is wrong

this is merely the definition of biological "fitness", stated twice. how this really comes into the big picture of evolution is this:

those, that are deemed the fittest, survive and are able to pass on heritable traits (in the form of genes) to the next generation. therefore those traits that lead to fitness and survival become more common over time

are we good here?