PHY.7:10 - Architectural Rationale

The action, allowed comparison and physical interpretation carry different information. Keeping them together prevents the mathematical operation of variation from silently choosing a physical theory. Keeping them distinct allows a return to the part that changed.

MATH.10 supplies the common variational argument. PHY.7 adds the physical choice of principle, interactions, constraint model and preparation. PHY.6 offers the alternative construction from balances and response laws. MMP and the computational patterns receive the resulting equations and conditions when the intended consequence needs further formulation or calculation.