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Comment by Zarathustra30

14 hours ago

That solution reminds me of the evil bit. However, if someone has the skills or resources to unset the bit, they likely are allowed to anyway.

https://archive.org/details/rfc3514

In case with Windows laptop, the verification proof might be for example, a digitally signed serial number of the motherboard (and the OS is itself signed to prevent tampering). While it's possible to work around this, an average kid or adult is unlikely to do it. And in case with a phone there is almost zero chance to hack it.