Fun trivia question:
I have 6 bottles of wine for which I know three are good and three are corked. I put them into three 2-bottle lots. In the first lot, there are two corked bottles. In the second lot, there is a corked bottle and a good bottle. In the third lot, there are two good bottles. Suppose before you decide to buy, I let you pick a lot and sample a single bottle from the chosen lot. The bottle you sampled is good.