Generally speaking when someone asks that question it is with an eye to disqualifying a speaker they don't want to listen to, on the basis of ad-hominem. Latin

Generally speaking when someone asks that question it is with an eye to disqualifying a speaker they don't want to listen to, on the basis of ad-hominem. Latin America? "You're ignorant, you know nothing!" China? "You're under their sway!" America? "Hypocrite!" I tend to prefer to simply not allow the discussion to veer in that direction, and keep people guessing if they must.