
I hope it is obvious why anyone who accepts the idea of objective truth and therefore of objective knowledge thinks […] that an argumentum ad hominem is an invalid argument. If someone makes a claim to truth and can give that claim the right kind of support, and if that claim is indeed true, then that person genuinely knows something. The fact that the whole enterprise of claiming and validating may have been carried out by someone who is racist or sexist is just irrelevant to the truth of the claim.
en
Rationalité et Réalisme : qu’est-ce qui est en jeu ? ('), 1993