<Bertrand Russel's Axiom of choice, if yes, you are done>
I am done anyway; she is smarter than I am, no chance...
By the way, I sent her the silly joke about the light bulb that you posted. I found it funny, especially given the fact that we had a bunch of these jokes back in Russia about communists, policemen etc. She was offened big time. I suspect, again, same problem - hard to argue. And when it's hard to argue, feeling offended may be a good defence.