I woke up really early this morning (early to bed) and hopped on facebook from under the covers to see what the night owls were doing. The first post was a riddle and in my partial-wake mostly-sleep state it blew my frigin mind. Now that I'm a little more conscious it's not quite as mind-boggling, but maybe keep it handy for when you need to wake up and your brain isn't cooperating."There is a great underground empire where there live knights. There are two kind of knights; Day-knights and Night-knights. Day-knights tell the truth by day and lie at night. Night-knights, of course, do it the other way round. Since it is an underground empire, you can't tell the time of day by any natural means. But the knights always know whether it's day or night. So, as a visitor to this strange world, you once meet a knight who tells you "I'm a day-knight and it's night". Since you forgot to wind up your watch a few days ago, you don't know the time. But can you tell from this sentence, whether it's day or night? And can you tell, whether the knight is a Day-knight or a Night-knight?"
Get it?
