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My ML pipeline was cheating. Cross-validation told me everything was fine.

My model was giving me suspiciously good results. Cross-validation looked completely fine. The problem? My pipeline was leaking information the model should never have seen. I fixed the leak and reran everything. The results changed dramatically. Full experiment + what went wrong: https://towardsda…

Read the full story at r/learnmachinelearning ↗

Timeline · 2 reports

  1. 2026-10-26 16:23 · r/deeplearning
    My ML pipeline was cheating. Cross-validation told me everything was fine.
  2. 2026-10-26 16:23 · r/learnmachinelearning
    My ML pipeline was cheating. Cross-validation told me everything was fine.

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