Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

¬(q → p) ↔ ((T ∧ (¬¬r ↔ s)) ∨ ¬s)

⇒ logic.propositional.notnot

¬(q → p) ↔ ((T ∧ (r ↔ s)) ∨ ¬s)