fact: Definition kvalid_ctx A phi := forall D (M : kmodel D) u rho, (forall psi, psi el A -> ksat u rho psi) -> ksat u rho phi.
imports: Undecidability.FOL.Semantics.Tarski.FragmentFacts Undecidability.FOL.Semantics.Tarski.FragmentCore Undecidability.FOL.Syntax.Facts Undecidability(Shared.ListAutomation)