Anyway, in his article, PG doesn't actually restrict his own argument on that way. However I don't think he's being very strict in his presentation of the hypot

Anyway, in his article, PG doesn't actually restrict his own argument on that way. However I don't think he's being very strict in his presentation of the hypothesis, and while he could present it in a much more formal and precise (and theoretically correct way), I'm not sure that would make a very interesting essay. I imagine PG knew there might be restrictions to his argument, such as bloodletting and Arc' (or Arc' with bloodletting, imagine that!)... bah, who knows...