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Noisy but Wise: How Simple Noise Injection Beats Shortcut Learning in Medical AI

X-rays look clinical. To a neural network, they can also look like stationery. A hospital name in the corner. A scanner signature. A compression pattern. A familiar positioning marker. A slightly different way of cropping the lung field. None of these is pneumonia. None of these is COVID-19. Yet a deep learning model trained on small medical datasets can treat them as wonderfully convenient diagnostic evidence, because machines are very good at passing exams and less naturally committed to understanding what the exam is about. ...

November 9, 2025 · 15 min · Zelina
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When Logic Meets Language: The Rise of High‑Assurance LLMs

A compliance officer does not want a beautiful answer. She wants to know which clause applied, which exception overrode it, which fact triggered the exception, and whether the conclusion still holds after someone adds one inconvenient detail. That is the annoying little problem with using large language models in serious workflows. They are fluent. They are often useful. They can explain themselves at length, occasionally with the confidence of a junior associate who has discovered formatting. But in law, medicine, tax, contract review, and policy compliance, reasoning is not merely the ability to produce a plausible paragraph. It is the ability to tie a conclusion back to rules, facts, exceptions, and provenance. ...

October 9, 2025 · 17 min · Zelina
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Charting a Better Bedside: When Agentic RL Teaches RAG to Diagnose

TL;DR for operators Diagnosis is not a search-box problem. A clinician does not simply type a symptom list, read a guideline, and pick a disease like ordering takeaway. The useful work is iterative: form a hypothesis, compare against similar cases, notice what does not fit, retrieve again, ignore plausible-looking rubbish, and only then commit. ...

August 24, 2025 · 18 min · Zelina