MMP.13:10 - Architectural Rationale

The observation model describes how records vary. The inferential construction determines how those records support conclusions about unknowns. Target propagation determines which consequence reaches the receiving use. Their separation permits a computation to be correct while its prior, target or observation assumption is still reconsidered.

This preserves the distinction from inverse-problem regularization, numerical computation, causal identification, model criticism and decision making. Those methods supply or receive particular contributions; none is obtained merely by fitting a statistical model.