Yes, and then they were horribly confused about why foo(A,B) fails, regardless. They clearly have heard of unification and find it a fascinating concept but have no idea what it means.

Honestly, we don't have to wrap everyone on the internets in a fuzzy warm cocoon of acceptance. Sometimes people talk bullshit. If they're open to learn, that's great, but the author is snarkily dismissing any criticism, so they can stew in their ignorance as far as I am concerned.

Like the OP says, the author didn't bother to RTFM before griping.