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)