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So my young lad.....

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  • 15-04-2015 8:12pm
    #1
    mirwillbeback
    Registered Users Posts: 2,003 ✭✭✭


    ....came home with this today.

    Mum walks in to three kids around a broken glass.


    Liam says he didn't do it.

    Ciara says Charlotte did it.

    Charlotte says Ciara is lying.

    Who is telling the truth?

    Is that right how he asked me? Says his teacher wouldn't give the answer!!


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    #2
    speakelton
    Registered Users Posts: 17 ✭speakelton


    Did he get an answer today? Was he asking it right?


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    #3
    biketard
    Registered Users Posts: 531 ✭✭✭biketard


    If only one person is telling the truth, then I think Liam did it, and only Charlotte is telling the truth about it.

    Liam says he didn't do it, so it was either Ciara or Charlotte.
    Ciara says it was Charlotte, so it can't be Liam or Ciara.
    Charlotte says Ciara is lying, so in other words either Liam or Ciara did it, but not her (Charlotte).

    There's only one situation where only one person says that a particular person did it.


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    #4
    Dozer Dave
    Banned (with Prison Access) Posts: 491 ✭✭Dozer Dave


    They are all lying.


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    #5
    DivingDuck
    Registered Users Posts: 1,396 ✭✭✭DivingDuck


    I assume there's only supposed to be one kid telling the truth? I think there's only one scenario where you can have two liars and one honest person, but I've been awake for 21 hours, so there's a good chance this is wrong:
    Liam says he didn't do it. Ciara says Charlotte did it. Charlotte says Ciara is lying.

    If Charlotte broke the glass:
    Liam is being honest saying he didn't. Ciara is being honest blaming Charlotte. Charlotte is lying by denying Ciara's correct accusation. Two truths, one lie.

    If Ciara broke the glass:
    Ciara is lying by blaming Charlotte. Charlotte is being honest by calling Ciara a liar for blaming Charlotte when Ciara was responsible. Liam is also being honest as he wasn't guilty. Two truths, one lie.

    If Liam broke the glass:
    Liam is lying saying he didn't. Ciara is lying by blaming Charlotte. Charlotte is being honest by denying the false accusation. Two lies, one truth.

    So Charlotte is the only one telling the truth?

    Of course, if you can have more than one person telling the truth, that's all out the window...


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    #6
    Mellor
    Registered Users Posts: 39,024 ✭✭✭✭Mellor


    mirwillbeback wrote: »
    Is that right how he asked me? Says his teacher wouldn't give the answer!!

    He is probably missing a part about there being only one person telling the truth.
    If that's case its Charlotte is telling the truth. But if two truth tellers is possible, then there's no solution.
    Dozer Dave wrote:
    They are all lying.
    Not possible. Charlotte says Ciara is lying, so only one of them can ever be lying.


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    #7
    Dozer Dave
    Banned (with Prison Access) Posts: 491 ✭✭Dozer Dave


    Mellor wrote: »
    Not possible. Charlotte says Ciara is lying, so only one of them can ever be lying.

    Why not, Charlotte could be telling lies.


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    #8
    Mellor
    Registered Users Posts: 39,024 ✭✭✭✭Mellor


    Of course she could, but read what Charlotte said again - "Ciara is lying"
    If Charlotte is lying, then Ciara isn't lying.


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    #9
    johnny osbourne
    Closed Accounts Posts: 4,017 ✭✭✭johnny osbourne


    charlotte is a liar

    ciara is honest

    liam did it


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    #10
    Ken.
    Closed Accounts Posts: 12,898 ✭✭✭✭Ken.


    If it was my mother 25 years ago we'd all get a visit from the wooden spoon. The guilty person got punished and the other 2 got a reminder to tow the line.


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    #11
    Dozer Dave
    Banned (with Prison Access) Posts: 491 ✭✭Dozer Dave


    Mellor wrote: »
    If Charlotte is lying, then Ciara isn't lying.

    Ciara could be lying.


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    #12
    Mellor
    Registered Users Posts: 39,024 ✭✭✭✭Mellor


    Dozer Dave wrote: »
    Ciara could be lying.
    And if she is, that means Charlotte is telling. Simples.


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    #13
    DivingDuck
    Registered Users Posts: 1,396 ✭✭✭DivingDuck


    Dozer Dave wrote: »
    Ciara could be lying.

    Out of two people with questionable honesty, if A accuses B of something, and then B accuses A of being a liar, only one of them can be telling the truth.

    If A's accusation is true, then B's claim A is lying is false.
    If A's accusation is false, then B's claim A is lying is true.

    If B's claim A is lying is false, then A's accusation must be true.
    If B's claim A is lying is true, then A is in fact a liar.

    You don't automatically know which one is the liar from this, but you know that one of them definitely is a liar.


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