For mnemonicsloth to make a strawman argument, he'd first have said something like "some people say <poor argument for $x>" and then go on "however, <picks apar

For mnemonicsloth to make a strawman argument, he'd first have said something like "some people say <poor argument for $x>" and then go on "however, <picks apart argument>, so we know $x is false". Therein lies the fallacy -- a disproof of a proof of $x is not a disproof of $x. In other words, it's not about presenting a person as a poor defender, it's about presenting a poor defense. Cutting straight to a person's worth as a commentator -- as mnemonicsloth did -- is argument "ad hominem" ("to the person").