Why evals matter more than prompts: a lawyer's case against non-deterministic legal AI

HamelHusain · x · 2026-10-21

Lawyer @lexnode argues legal documents tolerate zero non-determinism: models ignore skills no matter how carefully written, so he'd take a rigid docgen template with an AI that only fills variables over generalized legal AI. @renegadesilicon builds on this to argue evals matter more than prompt or engineering skills: instruction-following is measurable, skill "hard prohibitions" can become automated checks, code-based evals catch flaws deterministically and LLM-as-judge handles semantic ones. The post also points to Hamel Husain and shreya's evals course as a starting point.

Related event: Lawyer Slams AI Legal Drafting for Ignoring Constraints, Prefers Templates(2 posts)→

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