Author: Sune Fischer
Date: 15:14:03 09/26/02
Go up one level in this thread
On September 26, 2002 at 18:00:12, Uri Blass wrote: >On September 26, 2002 at 17:06:21, Sune Fischer wrote: > >>On September 26, 2002 at 16:42:37, Uri Blass wrote: >> >>>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. >> >>Yes it does: >>"the host, who knows what's behind the doors, opens another door-;say No. 3-;" > >This is only explanation of what happened. >The only information that is clear from the question is: >1)you play on a game when you choose a door. >2)The host knows what is behind the doors. >3)The host opened a door that is the wrong door. > >This information is not enough to decide if you should switch doors. > >It is possible to understand that the host has to open a wrong door but it is >not clear from the question. > >The question only says: >"host, who knows what's behind the doors, opens another door-;say No. 3-;which >has a goat" > >If his strategy is always to open a door is not clear from the question and the >only information that we know for sure is that he opened a door. Yes you can, what is being described to you is an algorithm of how the show will proceed/the rules of the game: 1)you play on a game where you choose a door. 2)The host knows what is behind the doors. 3)The host will open a door that hides a goat. 4)You now have to decide if you want to switch doors. >The question did not use past tense but present tense so it makes the impression >that the host always opens a door so I cannot say that merilyn was wrong but it >is not clear from the question so I cannot say that people who say that data is >missing are wrong. I don't see anything unclear about the question at all, he opens a door for sure, and more than that, he opens a door with a goat behind it, he can do this because he knows what the doors hide, there is no need for past tense, this guy can see into the future! -S. >Uri
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