## Archive for September 15, 2010

### Three Jokes from Italy

Thanks to Maurizio Codogno, who bought my book from bookdepository.co.uk (they were kind enough to ship it to him in Italy), and who also shared a few jokes that weren’t in *Math Jokes 4 Mathy Folks*. Enjoy them, hot off the presses from Milan!

**Question and Answer**

Q: What is the difference between a mathematician and a physicist?

A: The mathematician thinks there is only one straight line that passes through two points; the physicist, however, needs more data.

**Logic Exam**

A student asks his logic professor, “Sir, did I pass or fail the exam?”

The professor replies, “Yes.”

**Quantum Mechanics**

Every Friday night, a mathematician goes to the pub, sits on the next-to-last stool, turns to the last stool, and asks to a non-existent woman if she would like a drink. The mathematician returns every Friday night for a year, yet the bartender says nothing.

Finally, the last Friday before summer break, the bartender asks the mathematician, “Excuse me, sir. You are clearly aware that there is no woman sitting in that chair. Why do you keep talking to an empty stool?”

The mathematician responds, “According to quantum mechanics, an empty space is not really void. Virtual particles materialize and disappear at every instant. Nobody knows whether the appropriate wave function collapses in such a way that a beautiful girl will appear out of nowhere.”

The bartender raises his eyebrow. “Really? That’s interesting. But couldn’t you just ask one of the women already in the bar if she’d like a drink? Who knows, maybe one of them would say yes.”

The mathematican laughs. “Oh, sure!” he says. “And what is the probability of

thathappening?”