Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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