A speaker says, "there is no need for me to refute senator smith's ideas about regulating professional baseball. senator smith is unqualified to speak on baseball because he has never played any sport on the high school, collegiate, or professional level." this speaker is guilty of using which type of fallacy in reasoning?

This speaker is guilty of "attack on a person".

Argumentum ad hominem is a argumentative technique whereby a contention is countered by assaulting the character, thought process, or other characteristic of the individual making the contention, or people related with the contention, instead of assaulting the substance of the contention itself.