fact: Definition isNilCons : sigSim -> bool := fun s => match s with | inr sigList_nil => true | inr sigList_cons => true | _ => false end.
imports: Undecidability.TM.Basic.Mono Undecidability.TM.Combinators.Combinators Undecidability.TM.Code.Code Undecidability.TM.Single.EncodeTapes Undecidability.TM.Compound(TMTac MoveToSymbol Multi Shift)