I recently returned from the O’Reilly Open Source Convention in Portland Oregon. In the final talk of the event, Paul Fenwick, always an amazing presenter, offered a puzzle during his talk that I thought I’d share.
I will offer the puzzle below, but the best way to experience it is to watch Paul’s talk, Mindware Upgrades For Fun And Profit. No special technical or other background is necessary to enjoy it.
Albert is looking at Betty. Betty is looking at Charlie. Albert is a computer programmer. Charlie is not. Is there a computer programmer looking at a non-computer programmer?
What was most interesting to me is that the audience of about a thousand really smart people is then invited to raise their hands for “Yes” “No” or “Not Enough Information” and all but fewer than 10 people raised their hand for the same wrong answer! I failed along with the vast majority, and the other wrong answer outweighed the right answer (which might have had zero votes… I don’t remember.)
If no one posts the right answer here after a while, I’ll come back with an explanation, but I do encourage you to go watch Paul explain.