This came up in another thread. We might as well run a sciforums poll on it to see what people here would do. Here's the scenario: You are invited to play Pick-a-Box on an unusual TV game show. As a contestant, you are presented with two boxes, A and B. You are told that box A contains $1,000. Box B, on the other hand, contains either $1 million, or nothing. Box A is actually transparent, so you can see the thousand dollars sitting inside. Box B is opaque; you can't look inside it until after you've made a choice. Your task is to choose whether you will take either Box B only, or take both boxes (A and B). Here's the catch: Pick-a-Box employs a Superintelligent Predictor (the 'SIP'). You are told that prior to your appearance on the show, the SIP conducted an expert, detailed analysis of your personality and of the all possible methods you, personally, might use to make your choice. The SIP then loaded the boxes according to its prediction of your choice, as follows: If the SIP predicted you would choose Box B only, it put $1 million in box B. If, on the other hand, the SIP predicted you would choose both boxes, then it left box B empty. The prediction by the SIP was made before the taping of the show, and the loading of the two boxes (in particular, box B, containing either $1 million or nothing) was also done before you arrived at the studio (and the boxes have at no time been tampered with after they were loaded in accordance with the SIP's prediction). This Pick-a-Box show has been running daily for years, and the SIP so far has a perfect track record of predicting what each contestant will choose. That is, whenever the contestant has chosen both boxes in the past, it has always turned out that Box B was pre-loaded with no money, and whenever a contestant chose box B only, it was always found to contain $1 million. So, vote. What would you choose? And, more importantly, explain why you'd make the choice you made.