Separate the argument from the arguer

Address the claim on its merits, not the person’s motives or character.

Why it works

Ad hominem reasoning is cognitively cheap and feels satisfying — attacking the person discharges the emotional load without requiring engagement with the actual argument. But a bad argument from a credible person is still a bad argument, and a good argument from an untrustworthy source is still good. Keeping them separate is both logically necessary and emotionally de-escalating.

How to do it

1. Before responding, ask: "Is my reaction to this claim, or to who said it?"
2. State your engagement with the argument explicitly ("On the claim that…") rather than characterizing the person.
3. If you do need to discuss motives, flag it: "This isn’t about the argument, but about the context."

Evidence

The ad hominem fallacy is among the best-catalogued informal fallacies in logic; its prevalence is documented across political psychology research showing people evaluate identical arguments very differently based on the stated source. (observational)

The logic is sound; the empirical challenge is that source credibility does carry some genuine epistemic weight (experts are more often right), so the skill is discernment, not ignoring source entirely.

Sources

• Lord, Ross & Lepper (1979), biased assimilation of evidence based on prior attitudes, Journal of Personality and Social Psychology

Common mistake

Dismissing a claim entirely because of the source’s known bias — "they would say that" — without engaging with whether the argument itself has merit.