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>I could try that. He might just fall for it ... I mean he might see the light.

Let me know how it works...maybe I can be even more convincing :)

Okay, here goes...after he makes his first choice, point out that there is a 2/3 chance he is wrong. Ask him if he would rather stay with his current choice, or tell him you will let him open *both* the other doors. That is basically what Monte is allowing the person to do.