Exercise logic.propositional.cnf.unicode

Description
Proposition to CNF (unicode support)

Derivation

Final term is not finished

¬(r ∧ ((r ∧ ¬¬r) ∨ (¬r ∧ ¬r)))

⇒ logic.propositional.notnot

¬(r ∧ ((r ∧ r) ∨ (¬r ∧ ¬r)))