Or, for that matter, a source download. Or one you&#x27;ve hashed (how do you know the hash hasn&#x27;t been tampered with?), a microprocessor (have you looked at the microcode? the masks), a circuit, etc.<p>Turtles^H^H^H^H^H^H^HTrust all the way down.<p>I&#x27;m not being entirely facetious, either, given the advice about disposing of electronics after visiting certain countries.