Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

(¬(F ∨ ¬q ∨ p) ↔ ¬¬((r ↔ s) ∨ ¬s)) ∨ (¬(¬q ∨ p) ↔ ((r ↔ s) ∨ ¬s))