he made some point and i meant to say that i should have realised that myself and that i felt like an idiot for not having done so... but what i said was "that's idiotically obvious." And to emphasize what i'd done i started babbling about how i didn't mean to call him an idiot...

and everytime he mentions CBT or brings up something which is obviously a CBT technique i smile sweetly and say "those dirty CBT'ers"