Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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