Exercise logic.propositional.consequence

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

Derivation

Final term is not finished

p <-> r, q <-> s => (p || ~(p /\ q)) /\ ((q /\ r) || ~(p /\ q)) /\ (s || ~(p /\ q)) /\ ((p /\ q /\ r /\ s) || ~(r /\ s))