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I Threw Away Half My Training Data and Lost Nothing. Then I Threw Away Half My People and Lost Three Points

The HAR lane of this blog keeps circling one fact from different directions: subject identity is the hard axis . Split by subject and accuracy drops eight points; the worst subject in any split trails the average by fifteen; every augmentation win and every robustness trick earns its keep dispropor…

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  1. 2026-11-09 04:42 · DEV Community — Machine Learning
    I Threw Away Half My Training Data and Lost Nothing. Then I Threw Away Half My People and Lost Three Points

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