Author

Wen-Zhang Du

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Preprint Aug 2026

Which Reranking Conclusions Survive the Answer Interface? A Prospective Finite-Orbit Audit

Rerankers are increasingly evaluated through downstream language-model answers. This raises a retrieval-measurement question: if only the reader's answer interface changes, should we reach the same conclusion about BM25 versus BGE-v2-m3? We prospectively audit their claim-paired effect on RAGuard and FEVER with four re...

Wen-Zhang Du · 0 citations

Preprint Aug 2026

When Does Permutation Instability Generalize? Independent-View Validation for Listwise LLM Reranking

This study derives the exact finite-view decomposition and prospectively compares zero, one, and two reused views, including a fully disjoint four-view target, to study how this affects claims that a finite-view instability score predicts unseen permutations.

Wen-Zhang Du · 0 citations

Preprint Aug 2026

What Would Fix This RAG Failure? Auditing Counterfactual Response with Paired Evidence Interventions

Results show that evidence sensitivity occurs at meaningful rates in the hash-selected eligible-failure sample, is only partially predictable from the observed failure, and is conditional on the reader.

Wen-Zhang Du · 0 citations