The retained edge and switch mechanisms

Any established nonzero order-$\kappa$, order-${\hslash }^0$ defect cannot be canceled by terms starting at ${\kappa }^2$, or at positive $\hslash$-order, while its lower-order prescription is fixed. This coefficientwise observation does not identify the present defect with the different VI-B defect VIB. The original algebra is neither shrunk nor enlarged after the calculation.