dilbert: if you have any problems with the software, just give me a call.
client: what if you die or you're in a coma?
dilbert: well, in those cases i would not return your call.
client: so you're lying about getting back to me.
dilbert: no, i'm making a normal kind of generalization, which i assumed you would understand.
client: okay, so now you're calling me stupid, and you're a liar?
dilbert: if a liar calls you stupid, wouldn't that mean you are smart?
client: fair point
dilbert: thanks, i'm proud of it.