[jdmichal]

I'm pretty sure at this point that there is not a response I can give you to change your mind. This is my last attempt, because I'm tired and this is pretty simple logic.

If a individual does not successfully reproduce because of an individual trait, then that individual was selected against for not being fit. This is true no matter what the trait. As soon as an individual successfully reproduces, then that individual was not select against. This is a binary proposition: selected-against ⊕ ¬selected-against.

Now if some other individual happens to be capable of reproducing more, then that individual's traits will be proportionately better represented in the next generation. Over time, these different traits will spread throughout a population and become part of its natural variation.

HERE'S THE IMPORTANT PART: BUT they will both continue to exist within the population because there is no such thing as selecting for a trait. More successful traits will carry a higher proportion within the equilibrium than less successful traits, but all traits not selected against will exist in the population.

It's important to realize that this is a GOOD THING. If individuals were selected for, reductio ad absurdum, only the "best" individuals would survive. This would lead to lower variation within the population, which would make it extremely fragile to changes. What was a relatively unsuccessful trait yesterday might become a very successful trait today.