Hard agree. If anything, it’s an ad-professorium attack using the discredited argument as (purported) evidence. Convincingly discrediting someone’s argument an

Hard agree. If anything, it’s an ad-professorium attack using the discredited argument as (purported) evidence. Convincingly discrediting someone’s argument and then marveling that such error or oversight would emanate from someone so credentialed is not ad-hominem. Ad-hominem is the exact reverse. Let us at least strive to keep our error classification and biases in good order.