PHY.6:10 - Architectural Rationale

Separating balances, response laws and preparation makes their different contributions recoverable. Balances restrict change; response laws add behavior; preparation selects admissible evolution. Combining these relations before imposing a solving order lets the same physical account support different mathematical questions.

The construction uses C.29.BB for common balance reasoning and adds the physical choice of interactions, response grounds and compatible preparation. MMP.10 and C.29.2 handle the subsequent formulation and obtaining of mathematical results. This division permits a return to the missing physical premise without treating every solver difficulty as a computational defect.

Energy-based composition is especially useful when storage, conversion and exchange dominate the question. Direct momentum, species or charge balances can be simpler for another consequence. A physical variational principle offers another way to derive motion when its premises apply. The balance-and-response route is selected here for the difficulty it resolves, without requiring one formalism for every physical account.