A model failure traces back to bad training data that passed every validation check you had. How would you reconstruct how it got in — and decide where the real defect lives?

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Stay specific. One example, told well, beats three told fast. Make your decisions visible — what you chose between. End on what changed, for whom.

A model failure traces back to bad training data that passed every validation check you had. How would you reconstruct how it got in — and decide where the real defect lives?

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