AI-FOR-DATA-SCIENCE5 MIN READ
Push Back on "Use All the Data"
Explain train-test separation and leakage risk to a stakeholder who wants to use all available data immediately.
Marcus M Product lead 1 Clarify 2 Translate 3 Offer path The moment 20 sec Sprint review Marcus wants to use the holdout data for training because the pilot timeline is tight. If the team contaminates evaluation, the launch decision rests on an inflated score. 20% holdout slice Friday launch readout
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