They don't have to admit that the decision was made by AI. One low-wage worker in HR can be the spokesperson who sells it as his decision.

So the thing about people who enforce laws is, they're not _completely_ stupid. Dodgy companies will pretty much always attempt to hide the fact that they're breaking the law; nothing new there.

No law specifically requires more than a coin flip, but firing people because some rando in HR "decided" without justification or documentation of cause can be risky.