Exercise logic.propositional.consequence
Description
Prove that formula is a logical consequence of a set of formulas
Derivation
(p -> (p -> q)) /\ p => q
⇒ logic.propositional.defimpl, initial=TList [TCon logic1.and [TCon logic1.implies [TVar "p",TCon logic1.implies [TVar "p",TVar "q"]],TVar "p"]](~p || (p -> q)) /\ p => q
⇒ logic.propositional.defimpl(~p || ~p || q) /\ p => q
⇒ logic.propositional.idempor(~p || q) /\ p => q
⇒ fakeabsorptionq /\ p => q
⇒ conj-elimq => q