Front matter

{ {0.945} Scope. This paper proves a second-order classical descent statement and a first-order obstruction to a specified switched realization of that statement. It does not prove a quantum Ward identity or a scheme-independent radiative correction.

Excluded endpoints. No ultraviolet completion, adiabatic limit, interacting Hilbert-space construction, localized probe, dense transverse-traceless representability theorem, or global multi-graviton contact classification is asserted. }