I dunno about the Polyjuice Potion thing. I mean, the Death Eater would've had to get out of the Vanishing Cabinet in the Room of Requirement, passing Ron, who was guarding it, go all the way down itno the dungeons where Snape's private rooms are, passing Hermione, who was guarding Snape's entrance. . . I dunno. Sorry to demean the theory. . .
sweatdrop I mean, it was really good! I had never thought of that!
The Occlumency thing though, I'm definitely sure that Dumbedore and Snape made eye contact for seconds too long. . .
3nodding