Harry channels his inner Slytherin

set following the pensieve incident during occlumensy, Harry has a sudden fit of the smarts and works to enlist more active aid from Snape. Unkind to Dumbledore and some Weasleys. Umbitch gets hers. Hermione has to think, and wises up. A peek at what might happen if the occasional use of logic and intellect was applied instead of hokey reasoning and blind belief in prophecy.