Agreed -- if they changed the experiment so it was verifiably trustworthy, I think most people who could do math would switch. Basically, it would be a repeate

Agreed -- if they changed the experiment so it was verifiably trustworthy, I think most people who could do math would switch. Basically, it would be a repeated game where the subject would be told by the experimenter. 1. I will put a black ball under exactly one of these two cups without you seeing it. 2. You will pick the first cup -- if you keep this cup and it's right, you get $5. 3. You will have an opportunity to change cups always, if you change cups and the changed cup is correct, you get $6. I cannot see the above experiment failing to generate most people always choosing change if repeated 10 times, with the above structure being common knowledge ahead of time. That's like saying "choose a cup with your left or right hand -- if you choose correctly with your left hand, you get $5, and if you choose correctly with your right hand, you get $6". Everyone would use their right hands.