How does Snape know?

[pippin_999]

No: HPFGUIDX 113581

Alla:
> Although I wonder how that conversation went. Poor 
Dumbledore . He  probably tried to tell Snape that Harry is 
special , that he may  succeed in Occlumency with proper 
teaching instructions. That Snape  should try and forget all this 
prejudice and ill will he harbored  against Harry. :o)
> 

I think we heard that conversation, only it was between 
Dumbledore, Snape and Sirius. DD told them they were on the 
same side now and they should trust each other, but that he'd 
settle in the short term for a lack of open hostility. 

If you read Snape's words, in the Occlumency chapter, 
ignoring the adverbs and the constructions that Harry puts on 
them ie "malevolently" ,"contemptuously", "insulting" 
"dangerously"  etc.  they're not hostile. Snape becomes very 
angry, but he does not make any verbal attacks on Harry. He 
does call him a lamentable potionmaker, but Harry would be the 
first to admit that was true. 

BTW, since Harry demonstrated his ability to throw off Imperius 
in front of all the Gryffindor fourth years, it would be remarkable
if the whole school didn't know about it.

Pippin