>>"I think, therefore I am" said {insert your favorite stupid ethnic group} and vanished.
>
>The variant I've heard is:
>
>Descartes walked into a bar. The bartender asked is he wanted something to drink. Descartes replied "I think not" and ceased to exist.

:)

IIRC, ther's a plaque on some house in Germany, saying something like "Heisenberg may have lived or not in this house for a while".