1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Need Help In Logic / Natural Deduction

  1. Aug 6, 2006 #1

    I need help please! :cry:

    In the class that I am in we went from doing tables to this shorter version, and I don't get it.


    1. ~JvP
    2. ~J
    3. S>J /?
    4. ?

    Would number 4. be ~P>J and the supporting lines be 1,3 with the DS (disjunctive syllogism)? I don't get it...

    Would it be the DS rule (pvq/~p//q)?

    Another one I don't get:

    1. H>D
    2. F>T
    3. F>H /?
    4. ?

    Would number 4 be D>F and the conculsion be HS (hypothetical syllogism, p>q/q>r//p>r)?

    Last edited: Aug 7, 2006
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted

Similar Discussions: Need Help In Logic / Natural Deduction
  1. Deductive Essay (Replies: 3)

  2. Help needed (Replies: 6)

  3. Need help (Replies: 5)