ad hominem is a type of argument where someone attacks or criticizes the person making an argument, rather than the argument itself. this is often done in an attempt to undermine the person's credibility or character, rather than focusing on the merits of their argument. here are some examples of ad hominem: "you can't trust what he says about politics because he's a convicted criminal." "she can't be right about the environment because she works for a big oil company." "he's just saying that because he's trying to be popular." in each of these examples, the person making the argument is attacked or criticized, rather than the argument itself being discussed. this can be a logical fallacy because it doesn't address the substance of the argument and can be used to distract from a discussion of the issue at hand.