"Ad hominem arguments are viewed, almost universally, as bad, bad, bad... Students are taught how to differentiate between their opponent and their opponent's argument. The rationale for doing so makes perfect sense. In theory, a person's merits are irrelevant to whether their argument makes logical sense. An argument depends on nothing more than whether its conclusion follows its premises; the speaker, you might say, is just the messenger." - Mehdi Hasan, Win Every Argument: The Art of Debating, Persuading and Public Speaking, 2023