> Elimination by evolution requires it to be both utterly nonviable and not tied to anything else. Neither of those things are required. Any disadvantage to re

> Elimination by evolution requires it to be both utterly nonviable and not tied to anything else. Neither of those things are required. Any disadvantage to reproduction frequency of an allele can lead to its extinction. Even a 'good' allele can lose to a 'better' one. (The scare quotes are to acknowledge that these terms are just frequency re-stated)