Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

Derivation

Final term is not finished

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