What is the defining feature of Argumentum ad hominem in argumentation?

The defining feature of Argumentum ad hominem is indeed centered on attacking the character or personal traits of the individual making an argument rather than addressing the argument itself. This tactic shifts the focus from the validity or soundness of the argument to irrelevant aspects of the person presenting it, which undermines productive discourse and logical reasoning. Rather than providing counter-evidence or refuting claims made in the argument, an ad hominem attack seeks to discredit the individual, often diverting the conversation away from the actual issues at hand. This kind of argument is considered a logical fallacy because it fails to engage with the substance of the arguments being made and instead relies on personal attacks, which are not a valid basis for evaluating the merits of a claim or viewpoint. Strong argumentation should focus on evidence and logical reasoning rather than personal characteristics or unrelated attributes.