Since my opponent's argument explicitly deduced that PUA-denunciation is a fitness strategy directly from its being a social act, and nothing else, it brooks no exceptions to the rule. If the rule is not universal, the argument falls through.

This claim is false. You do not understand how correct reasoning works.

It'd be interesting to see a reference to a study, a survey

So would I. This does not make your claim that "Nobody has a clue as to whether PUA works" a sane claim to make. You do not understand how evidence works and are also conflating the claim "there have not been scientific studies about" with "nobody has a clue about".

Oh, I see. Well, you're welcome to your definition of PUA, I'm not interested in debating it. If you have any data, do share.

Was not a definition. It was a reference to several commonly included aspects of the behaviour and declared strategies of actual real world communities. Not something you can use the 'dismiss as semantics' tactic on.