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Truth table

  1. Aug 8, 2013 #1
    1. The problem statement, all variables and given/known data

    Hello, I was working on the following truth table problems
    1.P→(Q→R)
    2.(P→Q)→R

    and wanted to know why I got different truth tables it seems that we could use the associative law to rewrite 1. in the same manner as 2.

    Or am I missing something?

    Thanks

    Higgenz




    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Aug 9, 2013 #2

    HallsofIvy

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    Staff Emeritus
    Science Advisor

    What "associative law" are you talking about? As far as I know there is no "associative law" for implications.

    Here, these two statements are clearly not the same.
     
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