Exercise logic.propositional.cnf.unicode

Description
Proposition to CNF (unicode support)

Derivation

Final term is not finished

¬(r ↔ r) ∨ ¬¬¬T ∨ ¬¬¬r

⇒ logic.propositional.notnot

¬(r ↔ r) ∨ ¬¬¬T ∨ ¬r