Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

(¬(¬q ∧ ¬q) ∧ ¬p) ↔ ((r ↔ s) ∨ ¬s)

⇒ logic.propositional.idempand

(¬¬q ∧ ¬p) ↔ ((r ↔ s) ∨ ¬s)