What the integration establishes

One relation, followed from source to lived use

The combined account explains more than the observation that an observer knows less than a whole history. Relativity supplies causal order, proper-time schedules and the difference between common existence and common availability. Target-relative mathematics identifies the missing relation. Physical realization determines whether it can arrive and survive until use. Enacted constitution supplies its conditional experiential significance. The same directed relation connects these stages in the source-to-use programme.

For the block account, this answers a definite explanatory demand. Retained predecessor, live contribution and anticipation differ within continuing activity. Their common availability does not make their sources simultaneous. Uptake can precede the sequence's end. Later forgetting does not undo it. Temporal hearing without psychological appropriation remains possible because useful bodily indexing and interpretation need not create an independent owner. An outside projector performs no additional required operation after the complete qualifying activity is admitted.

Removing eternalism leaves the resource theorems unchanged. Its contribution concerns actuality's interpretation, not a second experimental confirmation. Removing completion vocabulary leaves the quantum and relativistic mechanisms, but relinquishes the explicit target-fibre/attainability question and selected experiential constitution. The integration is explanatory without making every component logically dependent on the whole framework.

For Shadow Theory, the gain is disciplined realization. Source, history, record and interpretation cannot exchange roles. Preparation, communication, full joint calibration, finite retention, binding and use restrict presentation. The accuracy frontier and coherent-completion bound quantify those restrictions. An ordinary environment may carry an omitted distinction and later become a causal source for another readout. Reciprocal physical dependence inside a history is not reciprocal actuality by definition.

The direct reciprocal-pair theorem sharpens the ontological branch: translation, transitivity and the stated boost/spatial symmetries make one distinct mutual pair decisive without dilation or global symmetry. This weakens the classification route's premises. Yet a defensible fixed actuality relation and independent reciprocal witness are still needed. Process duration, causal dependence and covariant observer families do not supply them. Selector economy is also precise: where predictions, records and complete qualifying enactments factor through the retained history, no extra activation distinction is needed by minimal completion. Experiential equivalence uses identity; neither minimality nor forgetting an extra variable proves an exhaustive ontology or removes geometry-defined relations. Relational becoming remains a serious rival.

The physical argument excludes nominated closed descriptions and distinguishes constrained resource classes. It does not prove that every source-to-entire-history map is lossy. Identity realization survives the local and passive-history obstructions. Equal full experiment laws still admit complete operational surrogates. Existing source theorems retain their own assumptions and exact conclusions.

Two challenges therefore remain distinct: independent warrant and actual application of experiential constitution, and a physical/theoretical premise that excludes the nominated whole-history alternatives. Temporal explanation can advance without first solving a universal subject selector or proving the unknown Ground. This paper's result is the conditional, substantive bridge it actually constructs: a source-supported relation becomes locally operative and, under the selected constitution, experienced within a complete history.