KCAE.INDEX:4.5 - Provide an independent original-text route

Implement a route that can inspect source units without passing the same relevance filter. Enumerate permitted units from the snapshot, divide them into bounded reading batches, include their source addresses and necessary local context, and ask question-relative screening questions. Preserve the unprocessed extent and batch outcomes. The examiner may be a person, a generative model or a qualified typed assessor. The route can be used initially for a rare novel question, as a complement to indexes, or after a consequential suspected miss.

A first pass can ask whether a block contains a potentially useful condition, explanation or method; a second expands promising blocks into reading units. A later pass can search for an unresolved relationship across the retained sources. A single winner from each batch is unsafe where several contributions are needed: allow multiple candidates and an explicit no-candidate/unknown outcome. Scores normalized inside different batches are not globally comparable probabilities. Reassess finalists together or use separately qualified pointwise criteria.

A large corpus makes complete inspection expensive. Schedule by source order, strata or a declared sample that is independent of the failed selector; use affordable partial coverage when that can answer the current question. A stratified sample is a diagnostic route, not an exhaustive scan. If the route first chooses batches by the same summary classifier that failed, its independence has been lost. If the examiner reads all blocks but misses a cross-block relation, byte coverage has increased without semantic completeness. KCAE.SEARCH preserves both limits in its return.