I think it is understood from the context that PG is assumed to be a person of above average intellect and is thus expected to use more sophisticated and less l

I think it is understood from the context that PG is assumed to be a person of above average intellect and is thus expected to use more sophisticated and less lazy forms of arguments. That expectation sets the bar for the kind of argument he is expected to make. I believe the logical fallacy your statement is exhibiting is called "Begging the question" https://en.wikipedia.org/wiki/Begging_the_question https://en.wikipedia.org/wiki/Begging_the_question.