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> A Facebook exec's claim doesn't count as proof.

How about an official statement from Facebook itself over a year ago[1]? If it was true, people could find out by decompiling the app and make Facebook look absolutely horrible.

[1] https://newsroom.fb.com/news/h/facebook-does-not-use-your-ph...

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> How about an official statement from Facebook itself over a year ago

That also doesn't count as proof; it carries barely more weight than the Facebook exec's statement.

However, you're quite right about the decompiling argument. And chances are that security researchers have done just that.

It's one thing to lie, it's another thing to lie about something that could easily be found out and possibly get them sued. The risk/reward ratio seems way too high for Facebook to lie (unless they were forced to.) That's obviously not proof, but it seems like pretty strong evidence.

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