Author: Uri Blass
Date: 13:42:37 09/26/02
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On September 26, 2002 at 16:14:46, Sune Fischer wrote: >On September 26, 2002 at 15:30:42, Rolf Tueschen wrote: >> >>You are wrong because we had only one question. Was Marilyn right for the exact >>text of the question. I said no, because the question did not make clear that >>the host must _always_ open a door. > >What question are you refering too, not this one surely: >"Suppose you're on a game show, and you're given a choice of three doors. Behind >one door is a car; behind the others, goats. You pick a door-;say No. 1-;and the >host, who knows what's behind the doors, opens another door-;say No. 3-;which >has a goat. He then says to you, “Do you want to pick door No. 2?” Is it to your >advantage to switch your choice? " > >Not only does it say he opens a door, it also says he knows what is behind the >doors, and that he will open one with a goat, clearly he is all-knowing. The question says that the host knows. The question does not say that he always must open a door. The host's strategy may be also to open a door only if he knows that the first choice was correct and in that case switching your choice is a mistake. When you do not know the host's strategy then it is not clear what to do. Uri
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