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Your Model Isn't Bad. Your Eval Set Might Be Circular.

I built a rule-based sugar detector and a fine-tuned model to compete against it, ran them against my gold set, and the rule engine scored 100% accuracy. Every metric, perfect. It took me longer than it should have to notice the actual problem: most of that gold set had been labeled by running the…

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  1. 2026-09-24 13:00 · DEV Community — Machine Learning
    Your Model Isn't Bad. Your Eval Set Might Be Circular.

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