Manuscript En09-A@1 · En09-A.tex · remark · eafec9de
Remark: Extraction is weaker than dynamics
The complete relational Enter theorem › The instrument and the conditioning target · lines 644–650
The channel identity holds for every preparation and every calibrated orthonormal basis. Stationarity alone does not make an arbitrary basis a time observable. Covariance is the extra hypothesis that justifies the Schrödinger-type interpretation in (eq:relational-evolution).