Author

Alden Do Rosario

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#natural language process... Preprint Sep 2026

Jev-as-a-Judge for RAG Claim Verification: Confidence-Gated Cascading Between a Non-Generative Verifier and a Frontier LLM

Retrieval-augmented generation asks one question at volume: does this evidence support this claim? The answer is one bit, yet most pipelines obtain it from a text generator and pay generation prices for the prose wrapped around it. We compare a non-generative decision model, which returns a typed value from a declared...

Alden Do Rosario, K. Atef · 1 citation

Preprint Aug 2026

Why RAGs Hallucinate: Penalty-Aware Evaluation of Retrieval-Augmented Generation Systems with Knowledge-Gap Canaries

A penalty-aware evaluation framework for deployed RAG products is presented, combining asymmetric scoring, knowledge-gap canaries, questions whose answers are verifiably absent from the knowledge base, so that any answer constitutes ungrounded generation from parametric memory, and a failure-attribution pipeline that s...

Alden Do Rosario, Hussein Younes, F. Pires · 1 citation