This afternoon I had a spirited e-mail correspondence with a friend about the legitimacy of ad hominem arguments. He decried their use whereas I expressed openness to their use in some cases and within certain limits. Here, I turn to Robert C. Solomon’s essay, “Nietzsche ad hominem: Perspectivism, personality and ressentiment,” in The Cambridge Companion to Nietzsche, edited by Bernd Magnus & Kathleen Marie Higgins:
An ad hominem argument, as everyone learns in any Introductory Logic or Basic Composition course, is an attack directed “against the person” instead of addressed to his or her thesis or argument. To so attack the person is to commit a common elementary fallacy, albeit “informal.” Nevertheless, this fallacy is frowned upon almost as routinely as it is actually used, in philosophy as in politics and virtually every other human endeavor where people care more about winning the argument than obeying the rules of academic etiquette.
But are ad hominem arguments really fallacies? Or do they provide fair grounds for rejecting or at least being suspicious of the views or opinions of a person? The answer to the second question is, “of course they do,” and the answer to the first is, at least, “not always.” To recognize someone as a compulsive liar is to be suspicious, at least, of their most sincere-sounding pronouncements. To recognize that someone has a personal interest or investment in a case (e.g. a scientist hired by the Tobacco Institute to disprove the link between smoking and cancer) is good reason to be deeply suspicious of the supposed “objectivity” of the research, no matter how painstakingly pure the experimental methodology. It is true, of course, that such suspicions do not show such pronouncements or the conclusions of such research to be false. But the entanglements of truth and method, knowing and the knower, is such that the ad hominem argument is often – at least as a practical matter – conclusive. The thesis may be in fact be true, but in the absence of arguments from other, less suspicious parties, we may be rightly no longer willing to listen.
It is often said that the problem with an ad hominem argument is that it reduces a (possibly good) thesis or argument to the faults and foibles of its promulgator, thus eliminating or eclipsing our search for the truth. A cheap argument (“he’s drunk” or “she’s just an undergraduate”) may have this unfortunate effect, but a well-wrought ad hominem insight may explain what many pages or hours of analysis and textual exegesis will not. (“I seek to comprehend what idiosyncrasy begot that Socratic equation of reason, virtue, and happiness: that most bizarre of all equations, which, moreover, is opposed to all the instincts of the earlier Greeks.”) Ad hominem arguments expand, they do not limit, the field of philosophical argumentation. Instead of restricting the focus to mere thesis, antithesis and argument, the ad hominem approach brings in the motives, the intentions, the circumstances and the context of those who have a stake in the outcome. Or, in Nietzschean metaphor, ad hominem arguments make us look at the soil and the seed as well as the plant from which the flower grows. It allows us to see what is not being said or argued, the limitations of a position as well as its possibilities. (“The Socratic virtues were preached because the Greeks had lost them.”)
