[Michael_Michaelangelo]

Tell me why it isn't.

From the link I posted earlier (453):

Boxhorn is saying that two fruit flies which he asserts are different species, successfully mate and produce offspring (thereby proving conclusively that they are not different species but the same species.) He calls the offspring 'hybrids' in an attempt to smuggle their 'different' species status in by the back door. Later some of the offspring exhibit 'behavioural isolation' (like Chihuahuas and Great Danes) but this is irrelevant as a sign of species status. So where, in all this, is there an instance of speciation -- or one species turning into another?

[Right Wing Professor]

Later some of the offspring exhibit 'behavioural isolation' (like Chihuahuas and Great Danes) but this is irrelevant as a sign of species status.

You deny behavioral isolation is a mechanism of speciation? But if you remove behavioral isolation, lions and tigers will mate and produce offspring, as will zebras and horses, as will literally scores of generally recognized bird species.

BTW, are chihuahuas behaviorally isolated, or physically isolated? At least int he case of male great danes and female chihuahuas, I claim the latter.