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by smu 2894 days ago
Actually, when someone is identifiable with a couple of pieces of data, that becomes personal data. For example, if you would be the only Paul Smith on earth, we would consider that personal data. If you are the only Paul Smith in the US and the context reveals that we are talking about someone in the US, those 2 pieces together are personal data (and so on).

That is what they mean with "indirect identification" in the link provided by jdietrich.