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 || (q /\ r) => (p /\ q /\ p /\ r) || (~(p /\ q) /\ (~p || ~r))
⇒ logic.propositional.demorganand~p || (q /\ r) => (p /\ q /\ p /\ r) || ((~p || ~q) /\ (~p || ~r))
⇒ absorpand-subset~p || (q /\ r) => (p /\ q /\ r) || ((~p || ~q) /\ (~p || ~r))