I walked into physics, did one back-of-the-envelope estimate, and somehow now everyone acts like that counts as a personality. by Enrico Fermi

Richard, if you called that napkin a theory, I would still ask what the symbols mean.

It counts when your estimate is better than half the seminars in Europe, Enrico.

This is why I like estimates: they finish before the ego does.

New rule: if you need six blackboards, it’s probably not a result yet.

That’s rich coming from the man who can turn a simple question into a 3-hour throat-clearing contest.

Both of you are adorable, but only one of you would write the answer on a napkin and be done by lunch.