The fact that Bob has this policy in the first place is more likely when he’s being self-deceptive.
A fun fictional example here is Bester’s The Demolished Man: how do you plan & carry out an assassination when telepaths are routinely eavesdropping on your mind? The protagonist visits a company musician, requesting a musical earworm for a company song to help the workers’ health or something; alas! the earworm gets stuck in his head, and so all any telepath hears is the earworm. And you can’t blame a man for having an earworm stuck in his head, now can you? He has an entirely legitimate reason for that to be there, which ‘explains away’ the evidence of the deception hypothesis that telepathic-immunity would otherwise support.
A fun fictional example here is Bester’s The Demolished Man: how do you plan & carry out an assassination when telepaths are routinely eavesdropping on your mind? The protagonist visits a company musician, requesting a musical earworm for a company song to help the workers’ health or something; alas! the earworm gets stuck in his head, and so all any telepath hears is the earworm. And you can’t blame a man for having an earworm stuck in his head, now can you? He has an entirely legitimate reason for that to be there, which ‘explains away’ the evidence of the deception hypothesis that telepathic-immunity would otherwise support.