Quote from Jampilier:
No, infertility with A is required by definition.
Whose definition would that be -- your supervisor at Walmart?
With any mutation effecting the fertility of an individual within either AA or BB, there is now a new group CC composed of only that member. Surely you realize that.
I realize that you are either incapable of comprehending or intentionally refusing in order to protract what would otherwise result in your argument being destroyed.
Exactly, it is INFERTILITY between A and AA or BB that is required, as well as impossible. Also, the extinction of A does not solve the problem of its fertility with a supposed new species. They don't have to actually meet or otherwise coexist for the potential to interbreed to be a structural reality.
Sounds familiar. I think I heard this explanation once from one of my children while she was sucking her thumb and lying down for a nap.
You're still on square one.