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Tell if this Argument is valid (Propositional Logic)?

  1. Sep 20, 2011 #1
    Tell if this Argument is valid (Propositional Logic)?
    P = If a man is bachelor he is unhappy
    Q= if a man is unhappy he dies young

    C = so the conclusion will be Bachelors die young

    is his right ?

    This we have to write this in this form is this correct ----> means implies
    Q ---> Q
    Q
    ----------------
    R
    ----------------

    or

    P --->q
    Q --->R
    --------------
    P----->R
    --------------
    is this right ???

    please explain

    and tell be which operations to perform in truth table to prove the validity
     
  2. jcsd
  3. Sep 20, 2011 #2

    Stephen Tashi

    User Avatar
    Science Advisor

    You didn't say what you are abbreviating by "P", "Q" etc, so you haven't explained how you approached this problem.
     
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