He's not wrong about that. "Or we all got knocked in the head very hard. You don't have to be a wizard to get someone unconscious." He could offer to show him, but it would feel very wrong, seeing as he only turns to violence of that kind to defend himself.

Then again, many of the things he's seen here seem more mystical. The gifts he can't explain, some of the stranger things. He can't rule out wizards.