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I have a question: was the customer billed based on whatever the machine learning algorithm determined, or based on what humans decided after the fact? In other words, was the humans' job to just provide training data for future versions of the machine learning algorithm, or to manually fix the algorithm's errors and prevent over-billing?

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IIRC, they could correct your bill after the fact.

I used to joke with others that shoplifted items should be retroactively free - as long as you self report after the fact. (Extra useful training data...)

From my experience you just weren’t actually billed until they were done, it could be many hours after you left the store.

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