Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

(¬(¬¬q → p) ↔ ((r ↔ s) ∨ ¬s)) ∨ F

⇒ logic.propositional.notnot

(¬(q → p) ↔ ((r ↔ s) ∨ ¬s)) ∨ F