Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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