Section DerivableRules_multi_impp.
Context {L: Language}
{minL: MinimunLanguage L}
{Gamma: ProofTheory L}
{minAX: MinimunAxiomatization L Gamma}.

Lemma provable_multi_imp_arg_switch2: forall (xs: list expr) (x y: expr), |-- multi_imp xs (x --> y) --> (x --> multi_imp xs  y).