Which fallacy occurs when someone attacks a person's character instead of the argument they present?

The fallacy that involves attacking a person's character rather than engaging with their argument is known as Ad Hominem. This type of fallacy occurs when, instead of addressing the substance of an argument or the validity of the points made, one resorts to personal attacks against the individual making the argument. Ad Hominem arguments divert attention away from the actual issue at hand and attempt to undermine the opponent's credibility solely based on their characteristics or past conduct.

In a debate or discussion, using Ad Hominem tactics can significantly weaken the discourse, as it does not provide a logical counter to the argument and can lead to a breakdown in rational debate. Recognizing this fallacy is important, as it encourages individuals to focus on the quality of the arguments presented rather than the personal attributes of those involved.