The blonde man doesn't sound happy and by the frown that crosses Regis' face, it's obvious that he's not happy either. Still, he can be a stubborn man when he sets his mind to it, and in this case, that is exactly what he's doing.

A crooked grin replaces the frown on his face, "Challenge accepted. I'll let you know when I find more proof of my theory. Do let me know if you find more to support yours. We'll see who convinces the other first."