beoShaffer comments on What Evidence Filtered Evidence? - Less Wrong

43 Post author: Eliezer_Yudkowsky 29 September 2007 11:10PM

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Comment author: Origin64 05 November 2012 08:02:12PM 0 points [-]

plus the fact of the host choosing to open door #2.

As long as I don't know his motives (or on what level the host is playing, to put it in HPMOR terms) I can't infer anything from what the host does. He might have opened door 2 because the money isn't behind door 1 and I get another chance. Or because it is behind 1 and he wants me to switch so the company can keep the money. Knowing I should integrate his motives into the equation doesn't mean I can.

Or am I missing something essential here?

Comment author: beoShaffer 05 November 2012 08:29:29PM 1 point [-]

Since its a canonical (read most people will have seen it multiple times before) problem the article doesn't go into quite as much detail as it arguably should. Its a well known facet of the standard problem (explicitly stated in many formulations and strongly implied by the context in others) that Monty always opens an empty door that you didn't pick.