Exercise logic.propositional.consequence

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

Derivation

Final term is not finished

~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))