Argument Against the man concludes that a statement is false because it is made by a certain person. it is similar to the appeal to authority, expect that it is negative rather than positive. in the appeal to authority, the fact that certain person asserts a proposition is taken as evidence that the proposition is true. in the Argument Against the man, however, the fact that a certain person asserts a proposition is taken as evidence that the proposition is false. the argument Against the man takes the following form:
The argument against the man is committed when, instead of trying to disprove the truth of what is asserted, one attacks the man who made the assertion. This argument is fallacious because the personal character or the circumstances of a man are logically irrelevant to the truth or falsehood of what he say.