Thread View: sci.logic
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Started by WARREN GREENWALD
Wed, 06 Jul 2005 16:51
logic question
Author: WARREN GREENWALD
Date: Wed, 06 Jul 2005 16:51
Date: Wed, 06 Jul 2005 16:51
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An instructor teaches a class five days a week, Monday through Friday. He tells his class that he will give one more quiz on one day during the final week of classes, but that the students will not know for sure the quiz will be that day until they come to the classroom. What is the last day of the week he can give the quiz to satisify these conditions?
Re: logic question
Author: odin
Date: Wed, 06 Jul 2005 17:00
Date: Wed, 06 Jul 2005 17:00
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> An instructor teaches a class five days a week, Monday through Friday. He > tells > his class that he will give one more quiz on one day during the final week > of classes, but that the students will not know for sure the quiz will be > that day > until they come to the classroom. What is the last day of the week he can > give > the quiz to satisify these conditions? thursday
Re: logic question
Author: odin
Date: Wed, 06 Jul 2005 17:01
Date: Wed, 06 Jul 2005 17:01
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"odin" <ragnarok@yahoo.com> wrote in message news:aK-dnaek1Pjfk1HfRVn-sw@whidbeytel.com... >> An instructor teaches a class five days a week, Monday through Friday. He >> tells >> his class that he will give one more quiz on one day during the final >> week >> of classes, but that the students will not know for sure the quiz will be >> that day >> until they come to the classroom. What is the last day of the week he can >> give >> the quiz to satisify these conditions? > > thursday nope... wednesday
Re: logic question
Author: odin
Date: Wed, 06 Jul 2005 17:02
Date: Wed, 06 Jul 2005 17:02
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"odin" <ragnarok@yahoo.com> wrote in message news:wbydnecejeEZk1HfRVn-pw@whidbeytel.com... > > "odin" <ragnarok@yahoo.com> wrote in message > news:aK-dnaek1Pjfk1HfRVn-sw@whidbeytel.com... >>> An instructor teaches a class five days a week, Monday through Friday. >>> He >>> tells >>> his class that he will give one more quiz on one day during the final >>> week >>> of classes, but that the students will not know for sure the quiz will >>> be >>> that day >>> until they come to the classroom. What is the last day of the week he >>> can >>> give >>> the quiz to satisify these conditions? >> >> thursday > > nope... wednesday nope... tuesday
Re: logic question
Author: odin
Date: Wed, 06 Jul 2005 17:03
Date: Wed, 06 Jul 2005 17:03
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"odin" <ragnarok@yahoo.com> wrote in message news:Rt2dnYIEmeI6k1HfRVn-uA@whidbeytel.com... > > "odin" <ragnarok@yahoo.com> wrote in message > news:wbydnecejeEZk1HfRVn-pw@whidbeytel.com... >> >> "odin" <ragnarok@yahoo.com> wrote in message >> news:aK-dnaek1Pjfk1HfRVn-sw@whidbeytel.com... >>>> An instructor teaches a class five days a week, Monday through Friday. >>>> He >>>> tells >>>> his class that he will give one more quiz on one day during the final >>>> week >>>> of classes, but that the students will not know for sure the quiz will >>>> be >>>> that day >>>> until they come to the classroom. What is the last day of the week he >>>> can >>>> give >>>> the quiz to satisify these conditions? >>> >>> thursday >> >> nope... wednesday > > nope... tuesday nope... monday.... oh i get it!
Re: logic question
Author: odin
Date: Wed, 06 Jul 2005 17:05
Date: Wed, 06 Jul 2005 17:05
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"odin" <ragnarok@yahoo.com> wrote in message news:5Zqdndoxo_h2k1HfRVn-gw@whidbeytel.com... > > "odin" <ragnarok@yahoo.com> wrote in message > news:Rt2dnYIEmeI6k1HfRVn-uA@whidbeytel.com... >> >> "odin" <ragnarok@yahoo.com> wrote in message >> news:wbydnecejeEZk1HfRVn-pw@whidbeytel.com... >>> >>> "odin" <ragnarok@yahoo.com> wrote in message >>> news:aK-dnaek1Pjfk1HfRVn-sw@whidbeytel.com... >>>>> An instructor teaches a class five days a week, Monday through Friday. >>>>> He >>>>> tells >>>>> his class that he will give one more quiz on one day during the final >>>>> week >>>>> of classes, but that the students will not know for sure the quiz will >>>>> be >>>>> that day >>>>> until they come to the classroom. What is the last day of the week he >>>>> can >>>>> give >>>>> the quiz to satisify these conditions? >>>> >>>> thursday >>> >>> nope... wednesday >> >> nope... tuesday > > nope... monday.... oh i get it! Well.... if the students are smart, no day will work... but if the students are not smart, the they will at least know that it cannot be friday... But if they are very stupid, saturday would work...
Re: logic question
Author: Babylonian
Date: Wed, 06 Jul 2005 17:10
Date: Wed, 06 Jul 2005 17:10
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WARREN GREENWALD wrote: > An instructor teaches a class five days a week, Monday through Friday. He > tells > his class that he will give one more quiz on one day during the final week > of classes, but that the students will not know for sure the quiz will be > that day > until they come to the classroom. What is the last day of the week he can > give > the quiz to satisify these conditions? Try this: Since the instructor has decieved the students into thinking the test cannot be given on Friday, they won't know it will be given on Friday until they come to the classroom. A falsehood cannot be a truth, but a lie can. The weak form of the liar, "I am lying", can be resolved as a truth because the speaker is trying to decieve us into thinking his statement is false.
Re: logic question
Author: Babylonian
Date: Wed, 06 Jul 2005 17:32
Date: Wed, 06 Jul 2005 17:32
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Babylonian wrote: > The weak form of the liar, "I am lying", can be resolved as a truth > because the speaker is trying to decieve us into thinking his statement > is false. Actually, it can be resolved as a falsehood too, if we take it as a confession.
Re: logic question
Author: Timothy Little
Date: Wed, 06 Jul 2005 23:34
Date: Wed, 06 Jul 2005 23:34
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WARREN GREENWALD wrote: > the students will not know for sure the quiz will be that day until > they come to the classroom. What is the last day of the week he can > give the quiz to satisify these conditions? Friday, because he's lying. There is no day of the week he can set the test for which he can be sure that no student is sure that the test will be on that day. - Tim
Re: logic question
Author: Stephen Montgomery-Smith
Date: Thu, 07 Jul 2005 04:29
Date: Thu, 07 Jul 2005 04:29
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WARREN GREENWALD wrote: > An instructor teaches a class five days a week, Monday through Friday. He > tells > his class that he will give one more quiz on one day during the final week > of classes, but that the students will not know for sure the quiz will be > that day > until they come to the classroom. What is the last day of the week he can > give > the quiz to satisify these conditions? So the students figure out that the test can never happen, and they don't study. On Thursday the instructor comes in and gives them a quiz. They are all taken completely by surprize, and hence his condition is satisfied.
Re: logic question
Author: Michael
Date: Thu, 07 Jul 2005 09:51
Date: Thu, 07 Jul 2005 09:51
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WARREN GREENWALD wrote: > An instructor teaches a class five days a week, Monday through Friday. He > tells > his class that he will give one more quiz on one day during the final week > of classes, but that the students will not know for sure the quiz will be > that day > until they come to the classroom. What is the last day of the week he can > give > the quiz to satisify these conditions? There is no solution for that thing.. http://mathworld.wolfram.com/SurpriseExaminationParadox.html
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