Thursday 5 January 2012

Puzzle - 32

If a person makes the statement: “I never speak the truth”, the person can be said to be_______
(A)Speaking the truth
(B)Lying
(C)Lying as well as speaking the truth
(D)Making a logically contradictory statement
(E)Partially speaking the truth and partially lying  
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6 comments:

  1. Unknown27 November 2012 at 10:23

    b

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    1. MathByVemuri28 November 2012 at 17:51

      "I never speak truth"--
      1. If we consider it as true,
      =>then it means the person is speaking a true statement
      =>what he said is a false statement
      => there is a contradiction

      2. If we consider it as a false statement,
      =>we are not agreeing that "the person never speaks truth"
      =>we are certifying that he is speaking truth
      =>hence it should be a true statement.
      => again there is a contradiction

      Delete
    2. Raj Kumar16 January 2013 at 18:57

      sir please explain more more...
      i didn't get u

      Delete
    3. MathByVemuri17 January 2013 at 18:34

      The person has to speak either true or he has to lye. Only one of these two is possible. So, "I never speak truth" should be either true or false. If we consider it as true, then we have to agree with his statement that he never speak truth. But how can it be possible? How can the very statement "I never speak truth" be true? It itself is contradicting, isn't it? Similarly, how can it be false either? It's totally a self contradicting statement.

      Delete
  2. Anonymous2 August 2013 at 22:45

    it should be D.

    ReplyDelete
  3. Unknown27 November 2015 at 12:07

    c

    ReplyDelete

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