proposition: Lemma size_cnf s : sizef (cnf s) <= 2 * sizef s.
proof: Proof. exact: size_cnf_mut.1. Qed.
imports: Relations Lia Setoid Morphisms mathcomp(all_ssreflect) CompDecModal.libs(edone bcase fset base modular_hilbert sltype rewrite_inequality fset_tac)