{ι : Type u_1} →
  [inst : LinearOrder ι] →
    [inst_1 : LocallyFiniteOrder ι] →
      [DecidableLE ι] →
        {X : ι → Type u_2} →
          (a b c : ι) →
            ((i : ↥(Finset.Ioc a b)) → X ↑i) × ((i : ↥(Finset.Ioc b c)) → X ↑i) → (i : ↥(Finset.Ioc a c)) → X ↑i