Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

(¬(q → p) ↔ (((r ↔ s) ∧ (r ↔ s)) ∨ ¬¬¬s)) ∧ T

⇒ logic.propositional.notnot

(¬(q → p) ↔ (((r ↔ s) ∧ (r ↔ s)) ∨ ¬s)) ∧ T