proof
P42 Continuity criteria disagree
Lean spine source
formal/AlignmentProofSpine/Philosophy.leanFrom the machine-checked spine in formal/ (core modules are Mathlib-free;Field/Finite/ may import Mathlib). Not self-contained for Lean 4 Web — use the repo or a local lake build.
theorem P42_continuity_criteria_can_disagree :
∃ x y : Bool, ToyMemoryContinuous x y ∧ ¬ ToyBodyContinuous x y :=
⟨true, false, trivial, by decide⟩
/-- C-LIMIT (P44, amended): technical invariants do not determine legitimacy.
There is a technically-invariant change accepted by one legitimacy ordering
and rejected by another. (Not the inconsistent `L c ∧ ¬ L c`.) -/