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80-150 The Nature of Reason

Summer Two 2001, Dirk Schlimm
Homework No. 13
Thursday, July 19 
  1. Reading.
    TTT, finish Chapter 5, pages 129-137.

    If you have questions about something explained in the text, write it up, bring it to class, and ask it at the beginning of next's class.

  2. Review questions. (6 points)
    • TTT, page 137, No.3.
    • TTT, page 138, No.8 and 9.

  3. Natural Deduction. (4 points)

    Give a proof using the rules of Natural Deduction (Handout) that from a contradiction A & not-A you can derive any proposition B. Try to get as far as you can!