[Frumious Bandersnatch]

That's exactly what I said, only with more words. And you are right that speciation is not neat and tidy. It is often times in the eye of the beholder. IOW, what one person claims is a species another person claims is not.

However, it is generally agreed amongst evos that if two disparate sexual groups are able to interbreed as a matter of course, and their offspring can also breed, then the two groups are of the same species.

That's my point. How can two separate species of humanoids interbreed and produce non-sterile offspring. My argument here, would be that both groups are of the same species and that they are probably of different races, certainly no more than different sub-species.

[js1138]

However, it is generally agreed amongst evos that if two disparate sexual groups are able to interbreed as a matter of course, and their offspring can also breed, then the two groups are of the same species.

No, that's a very confused statement.

Of course individuals that routinely breed are of the same species, but there are populations that are genetically capable of producing fertile offspring that seldom or never interbreed. You are asking questions that imply the word species somehow determines reality. Species is just a word with fuzzy edges. Darwin called species a strong variety. He also used the term race interchangeably with species. They're just words.