He's not "citing sources." He's outsourcing his argument to textbooks. The point stands: if you want to refute an argument, do so yourself, possibly with refere

He's not "citing sources." He's outsourcing his argument to textbooks. The point stands: if you want to refute an argument, do so yourself, possibly with reference to corroborating sources. Don't just say "you're wrong. Go read this stuff to figure out why" -- that's no way to have a discussion.