Exercise logic.propositional.consequence
Description
Prove that formula is a logical consequence of a set of formulas
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
(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