Exercise logic.propositional.cnf.unicode

Description
Proposition to CNF (unicode support)

Derivation

Final term is not finished

¬((¬¬r ↔ r) ∧ ¬¬r ∧ T)

⇒ logic.propositional.notnot

¬((¬¬r ↔ r) ∧ r ∧ T)

⇒ logic.propositional.truezeroand

¬((¬¬r ↔ r) ∧ r)