Exercise logic.propositional.consequence

Description
Prove that formula is a logical consequence of a set of formulas

((p /\ q) || (~p /\ ~q)) /\ ~p => ~q
ready: no

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Environment

initial=TList [TCon logic1.equivalent [TVar "p",TVar "q"],TCon logic1.not [TVar "p"]]

Path 1

path[0, 0, 0, 3, 0, 0, 2, 0, 0, 3, 3]
steps11
major rules2
active labels
  • consequence
  • cnf
  • eliminateimplequiv

enter consequence, initial, conj-intro, navigator.down, navigator.down, enter cnf, check, navigator.down, check, enter eliminateimplequiv, logic.propositional.defequiv