Sure. We're well into "Hard to make a man understand something if his salary depends on him not understanding it" territory here. The more interesting question

Sure. We're well into "Hard to make a man understand something if his salary depends on him not understanding it" territory here. The more interesting question is, if you incentives are strong enough to want to deny the nature of a system, do you become a liar or do you genuinely stop understanding it? Was Yellen's bafflement at the non-transitory inflation a mere act, or was it genuine confusion caused by a core corruption of her own understanding of basic economics?