theorem AxiomaticThinking.Belief.At.toParent
theorem AxiomaticThinking.Belief.At.toParent: ∀ (x t : Type) [At x t], Conception.At x t
theorem AxiomaticThinking.Belief.At.toParent
theorem AxiomaticThinking.Belief.At.toParent: ∀ (x t : Type) [At x t], Conception.At x t