∀ {T : Type u_2} {Ω : Type u_3} {E : Type u_4} {mΩ : MeasurableSpace Ω} {P : MeasureTheory.Measure Ω} {X : T → Ω → E}
  [inst : NormedAddCommGroup E] [inst_1 : MeasurableSpace E] [BorelSpace E] [inst_3 : NormedSpace ℝ E]
  [SecondCountableTopology E],
  ProbabilityTheory.IsGaussianProcess X P → ∀ {s t : T}, ProbabilityTheory.HasGaussianLaw (fun ω => X s ω + X t ω) P