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.)

okay so its friday morning. all the students are sitting waiting for teacher, safe in the knowledge that seeing as they havent had the test yet this week it couldn't possibly be happening today (else it wouldnt be a surprise).....

teacher walks into the room "right class....shall we get on with the test?"

Posted by ben on 2003-12-20 21:36:24