I would argue it's less about "a class of people", and more about "the context/aim of the conversation". If it's a "discussion", i.e. a conversation with the a

I would argue it's less about "a class of people", and more about "the context/aim of the conversation". If it's a "discussion", i.e. a conversation with the aim of improving the understanding of all parties involved, "winning" is the worst outcome, and fallacious arguments are likely to be done by accident and gladly corrected. If it's a debate, then by definition you're trying to win, and all bets are off. PS. It may be true however that a particular "class of people" enjoys plugging themselves in one type of conversation more than the other.