Supposedly, Feynmann would sign in at Los Alamos, sneak out & come back & sign in again: http://oakridgevisitor.com/history/behindfence1.html Richard Stallman, of GNU fame, used to do the same thing at Project MAC, MIT. Even though Project MAC was never a "secure" facility like Los Alamos, this behavior still drove the guards crazy. At 11:53 AM 10/29/2007, Dan Asimov wrote:

...

From the N.Y. Times, October 28:

<< Joke of the Day

A mathematician is someone who thinks that if there are supposed to be three people in a room and five walk out, then two must enter the room in order for it to be empty.

— Found on an mitadmissions.org blog.

...

...

--Dan