fact: Hypothesis HI : forall x y, i_P x y -> (exists s t, s/t el R /\ x == ienc s /\ y == ienc t) \/ (exists s t u v, s/t el R /\ x == iprep s u /\ y == iprep t v /\ i_P u v /\ ((i_less u x /\ v == y) \/ (i_less v y /\ u == x) \/ (i_less u x /\ i_less v y))).
imports: Lia Arith Undecidability.PCP.PCP Undecidability.PCP.Util.PCP_facts Undecidability.Synthetic.DecidabilityFacts Undecidability(FOL.Utils.FullSyntax) Undecidability(FOL.FSAT) Undecidability.Shared.ListAutomation