Record agreement can conceal different residual channels

This independently proves the record–residual shape reported in VIII-A CheungVIIIA. Equality of effects is weaker than equality of complete instruments, including their residual ownership and reference correlations.

Finite destructive-readout semantics and operational characterization results are separate from field-theoretic instrument construction CheungI,CheungEnter. A correlator or formal coefficient is not automatically a positive effect or an apparatus coupling.