Exercise logic.propositional.dnf.unicode

Description
Proposition to DNF (unicode support)

¬(¬q ∨ p) ↔ ((r ↔ s) ∨ ¬s)

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Path 1

path	[0, 0, 2, 0, 1, 3, 0]
steps	7
major rules	2
active labels	dnf eliminateimplequiv