A professor tells his class that he will give them a surprise examination sometime next week.

For our purposes, an examination is considered a "surprise" if on that day, the class is not 100% sure that they will get an examination. (If they only suspect it, the examination can still be a surprise.)

Having given the class this warning, is it still possible for the professor to give them a surprise examination next week? (Assume that he will not give them an exam if it will not be a surprise.)

It's not really a paradox... The students know the teacher is lying about it being a complete surprise, so they can just assume there will be a test some time next week.

Posted by Gamer on 2003-04-11 13:32:52