An elephant, an engineer and a mathematician

[jack]

For sunflowerinrain and the nice librarian in the black dress I can't remember the name of.

An elephant, an engineer, and a mathematician walk into a building and the mathematician says "If two people leave, the building will be empty again," and the engineer scratches himself with his tusks and trumpets loudly.

Comments

[cartesiandaemon.livejournal.com]

How do you take that reading? Do you mean "An E, an E, and a M" -- that is "wrong", but I'm doing it in the sense of logic puzzles like "Two fathers, two sons, a grandfather, and a grandson enter a building. There are only two men there. How come?"

[hmmm-tea.livejournal.com]

I feel somehow sure that those logic puzzles are phrased slightly differently to that to make them work, but I could just be imagining it...