Exercise logic.propositional.cnf.unicode

Description
Proposition to CNF (unicode support)

Derivation

Final term is not finished

¬(r ↔ (r ∨ r)) ∨ ¬T ∨ F ∨ ¬r

⇒ logic.propositional.nottrue

¬(r ↔ (r ∨ r)) ∨ F ∨ F ∨ ¬r