But did Quirrell know that Dumbledore would have realized? (I mean, there’s also a reasonable chance that Dumbledore was already well aware that Quirrel was Voldemort when he hired him but did it anyway, not least because if Voldemort was teaching Defense Against the Dark Arts he wasn’t going around leading Death Eaters and killing people.)
But did Quirrell know that Dumbledore would have realized? (I mean, there’s also a reasonable chance that Dumbledore was already well aware that Quirrel was Voldemort when he hired him but did it anyway, not least because if Voldemort was teaching Defense Against the Dark Arts he wasn’t going around leading Death Eaters and killing people.)