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by mr_toad 776 days ago
> the only 100% guarantee is when the data is deleted before the model is retrained

That’s not even a guarantee. A model can hallucinate information about anyone, and by sheer luck some of those hallucinations will be correct. And as a consequence of forging (see section 2.2.1) you’d never be able to prove whether the data was in the training set or not.