Concept

Three Durable Signals of Strict-Parity Prerequisite Retrieval

Under this paper's strict-parity contract, the corrective takeaway of the headline retrieval table is that adaptive depth gating is not the main story. The durable signals that survive strict-parity comparison are exactly three: (i) deterministic bidirectional diffusion with role-aware quotas on LectureBank-Full, (ii) language-matched seeding on MOOC-CS, and (iii) leakage-aware evaluation (question-disjoint and target-concept-disjoint controls) that narrows what these benchmarks can support. Adaptive depth and other graph-policy variants either remain statistically tied to a fixed-depth hierarchical baseline or do not contribute beyond these three signals.

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Updated 2026-05-17

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Auditable Strict-Parity Evaluation of Prerequisite-Graph Retrieval for RAG under Leakage Controls

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