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- Path: sparky!uunet!pipex!unipalm!uknet!mcsun!news.funet.fi!polaris!sara.cc.utu.fi!jhaukioj
- From: jhaukioj@sara.cc.utu.fi (Jussi Haukioja)
- Newsgroups: sci.logic
- Subject: Re: The poor parachutist...
- Message-ID: <1992Aug19.110413.1@sara.cc.utu.fi>
- Date: 19 Aug 92 08:09:44 GMT
- References: <1992Aug18.131259.14667@wisipc.weizmann.ac.il>
- Sender: news@polaris.utu.fi (Usenet News admin)
- Organization: University of Turku, Finland
- Lines: 20
-
- In article <1992Aug18.131259.14667@wisipc.weizmann.ac.il>, jhsegal@wiscon.weizmann.ac.il (Livy) writes:
- > Ok..Now let's see you,logic gguys resolving this question:
- > Let's assume that somewhere(on other planet??) there are 2 cities:a city with
- > honest people ,who NEVER lie,and a city with crooks,who NEVER TELL the TRUTH.
- > One day per year they are going to shoping to the other city,so they are all
- > mixed together in both cities.On the very same crazy day,a poor parachutist
- > jumped exactly in one of the two cities.The guy know he is in one of those
- > cities,but he doesn't know in which of them.Now THE BIG QUESTION is:What
- > question should he ask one of the people he sees,so he could deduce in which
- > city he is.Remember:The man he is asking could be a liar or a honest man.HE (the
- > parchutist) doesn't know it.
- >
- > NOW,let's see your brains working!!
- > Livy. (I know the answer!!)
-
- Easy. Just ask someone: "Do you live here?". If the answer is "yes", you're in
- the honest city, if it's "no", you're in the liars' city. The parachutist won't
- know whether he's talking to a liar or not, but he'll know which city he's in.
-
- Jussi.
-