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Thread: Philosophy Help!!!

  1. #1
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    Default Philosophy Help!!!

    does anyone here take or have taken phil279??
    i have a couple questions, i have been trying these all last night and today but cant seem to figue it out!

    1. Derive "A" from:
    A v B, ~C, ~B v C

    i am having trouble with the two disjunctions. I try to get "A" using negation elimination but i cant seem to get it right. PLEASE HELP!!!

    2. Show that [(A > B) > A] > A is a theorem.
    Ok, first, i couldlnt find the if-then conditional symbol, so i used ">", so > is the symbol for a if-then conditional. I started off this proof by assuming (A > B) > A, which i think is right, after thaty, i just got lost, i am trying to derive "A" under the main scopeline but i am having some major troubles. thx!!

    ps, this is all in SD. thx!

  2. #2
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    come on guys! HELP!!

  3. #3
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    pm girlracer she helped my buddy with his phil ?'s!!

  4. #4
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    Default Re: Philosophy Help!!!

    Originally posted by Impreza
    does anyone here take or have taken phil279??
    I have taken both PHIL 275 and 279 (Logic I & II), but I forgot 99.9% of it, it's not the kind of stuff one remembers.
    I'm sure that if I can figure it out, you can too.

    Free bump for you.
    "All these years I thought it was power that brought responsibility. It's not. I was wrong. It's responsibility that brings power. It's knowing what needs to be done that brings strength. And courage." - Peter Parker, Earth X

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