For what values of &quot;full knowledge&quot; - you bootstrapped your compiler and verify every line of source code you&#x27;ve downloaded. But then if you&#x27;re up against nation state actors they can probably force your source code source to be compromised for you and only you - so those &quot;many eyes&quot; are seeing different code. You are after all checking that other people have the same hashes for the download that you use...<p>Then we&#x27;re getting into compromised hardware, you verified that the chips actually are the same as the circuit diagrams after all.<p>There is only so much tinfoil you can deploy. If an advanced nation state truly has you in its sights there isn&#x27;t much you can do about it, and to be honest that&#x27;s the way it should be. We sacrifice individual liberties for the advantages of being part of an organised society, and the limitation of coercive power to the state is a key part of that.<p>A well regulated state in which the right people get targeted, with an acceptably low false positive rate that scales based on the degree of privacy violation of the targeting seems to be a perfectly sensible state of affairs. Apple&#x27;s argument that they are being asked to do something that isn&#x27;t justified fits just fine into that.