boss: anonymous sources tell me you have been stealing from the company.
dilbert: anonymous sources have no credibility.
boss: that's exactly what they told me you'd say.
dilbert: why do you trust them over me?
boss: well, for one thing, i hear you're a thief.
dilbert: you heard that from the anonymous sources that have no credibility!
boss: why would they lie to me?
dilbert: same reason you lie to me.
boss: okay, that makes sense.