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PRL Project

Logical Investigations, with the Nuprl Proof Assistant
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Exercises


Show the proof and find the extract of the evidence for the following theorems:

  • Theorem 14: ((∼P) ∨ Q) ⇒ (PQ)
  • Theorem 15: (PQ) ⇒ ∼∼((∼P) ∨ Q)
  • Theorem 16: ((PQ) ∧ ((P ∨ ∼P) ∨ (Q ∨ ∼Q))) ⇒ ((∼P) ∨ Q)





Answers to exercises are shown in Appendix B.