You have been in contact with a superior being/god (read “supercomputer” if you are not of a religious mind). You know this being has a track record of always being 100% correct. It/he/she has never made a mistake.

It presents you with two vaults. Vault A has a window in it and you can see $10,000 in it (more or less). Vault B has no windows.

The being tells you that you have two choices. You can either have both vaults opened or you can choose to just open up Vault B. The being tells you that he has made a prediction and based on this prediction he has already filled Vault B (or not).

If he has predicted that you will open up both vaults, and then he left Vault B empty (you’d get the $10,000).
If he has predicted that you will only open up Vault B, he has put $1,000,000 into it. (and you’d get the $1,000,000).
In any case, whatever is in the vaults is yours to keep. Would you choose to open both vaults or just vault B?