SEP 10, 2026 · PREPRINT
Published Unlearning Numbers Move Per Checkpoint, and Not Because the Removed Data Survives: An Audit of 263 Released Batch-Normalized Checkpoints
arXiv
An uncontrolled audit of machine learning checkpoints documenting a technical artifact in batch-normalization statistics that affects a small fraction of published unlearning verdicts, without experimental intervention or comparison group.
PreliminaryJunlong Shen Xingyu Li
Reported
Released checkpoints assessed for…221
Checkpoints moving past seed vari…47
Verdict crossings observed12