Intellectual jokes...

Two of, one philosophical, one mathematical.

So, Descartes, Satre and Socrates are all sitting around a table in a fantastic restaurant. They start with a wonderfully light seafood bisque, followed by a pallette-cleansing lemon sorbet, a rich pesto and pine nut gnocchi and, finally, a warm beef salad. They are all enjoying a post-dinner cigar when the waitress comes around with the sweet trolley. She asks Descartes if he would like some dessert, to which he replies;
"I think not." Then he vanishes.

A sexy, lady donut is sitting at a bar and a sleazy danish slides up to her.
"So what's your sign, baby," he slurs.
The donut gives him a withering glare.
"Duh. I'm a Taurus."