The New Yorker:
A man in a town married twenty women. There have been no divorces or annulments, and everyone in question is still alive and well. The man is not a bigamist, and he has broken no laws. How is this possible?
This is the so-called marrying-man problem, which psychologists often use to study creative insight: the process by which we suddenly figure out the answer to something that had previously stumped us. A problem makes no sense at first. But then we turn it around in our minds and, presto, the answer comes. So, naturally, Mark Beeman, a cognitive neuroscientist at Northwestern University, who studies insight and creativity, likes to pose questions like this one to applicants who want to work in his lab. (The answer to this particular conundrum is that the man is a priest.)
Read the whole story: The New Yorker