> You can't trust anything unless you built it yourself [0].
As "Reflections on trusting trust" (https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_Ref...) points out, you can't trust anything including if you built it yourself, at least assuming you mean 'build' in the software sense. Even in the hardware sense, it's probably beyond the reach of anyone, let alone any individual actor, to build a modern computing machine from bare metal in a way that involves no trust of a third party.
As "Reflections on trusting trust" (https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_Ref...) points out, you can't trust anything including if you built it yourself, at least assuming you mean 'build' in the software sense. Even in the hardware sense, it's probably beyond the reach of anyone, let alone any individual actor, to build a modern computing machine from bare metal in a way that involves no trust of a third party.