If we're having a formal debate on the merits of the axiom of choice and I call you fat, it is an ad hom. If we're having a beer and and I ask you what's up wit

If we're having a formal debate on the merits of the axiom of choice and I call you fat, it is an ad hom. If we're having a beer and and I ask you what's up with your weight gain, it is not.