To some people the answer is obviously box A — you get $1,000,000 because the predictor is perfect. To others, the answer is obviously to pick both, because no matter what the predictor said, it’s already done and your decision can’t change the past, so picking both boxes will always net you $1000 more than picking just one. Neither argument has any obvious flaw. That’s the paradox.
The box with $1,000,000?
To some people the answer is obviously box A — you get $1,000,000 because the predictor is perfect. To others, the answer is obviously to pick both, because no matter what the predictor said, it’s already done and your decision can’t change the past, so picking both boxes will always net you $1000 more than picking just one. Neither argument has any obvious flaw. That’s the paradox.