Commuting channels do not furnish an observable algebra

The example does not challenge locality proved from actual commuting regional algebras. It excludes an inference from superoperator commutation alone.

En05-C's tensor-free snapshot–channel–adjoint equivalence is an algebraic dependence statement, not a metric reconstruction. En05-B and En06-B use their own prescribed geometries, routes, and speed calibration. En06-A distinguishes operational limits, observable-product hypotheses, and frame covariance CheungEn05B,CheungEn05C,CheungEn06A,CheungEn06B. Those positive scopes are not denied and are not transferred to the incidence register.