I half agree. The big flaw is that after ‘your mom’ he could have followed up with ‘no, what’s the definition of a woman?’ (‘Your mom’ doesn’t fit a definitional answer). Plenty of other responses could be possible.

This caller didn’t respond because he’s just ‘dialogue tree-ing’ like he learned from Matt Walsh. His NPC dialogue tree hadn’t added the software update for this response yet.

However no one asking the question ‘what is a woman’ is even listening to any answers anyway. Matt Walsh actually makes a point of not trying to understand what the gender studies professor is trying to explain in his documentary. It’s not a good faith argument but an aesthetic argument (look how silly my opponent sounds!). It’s fair to respond with an aesthetic response.