Why Snape turned

[zgirnius]

No: HPFGUIDX 159883

--- In HPforGrownups at yahoogroups.com, puduhepa98 at ... wrote:
>
> Carol
> <big snip>
> I think it's most unlikely that Snape was looking for a teaching job
> at  the time of the Prophecy whether he was a loyal DE or not. Mike
> could be  right that it's a cover story (at least what DD told
> Trelawney after Snape  actually became a teacher nearly two years
> later). It could be that  Trelawney's memory is confused by time and
> cooking sherry.
> <more snip>
> 
> Nikkalmati:
> Hmmm, so DD gave Trelawney a fake story to explain why she saw SS 
at  the 
> Hogs Head? Sounds like collusion had already begun between SS and 
DD to  give him 
> a cover story. Hi Mike.
> Nikkalmati  
> 

zgirnius:
Personally, I do not think Trelawney ever approached Snape to ask why 
he was listening at the door during her job interview. And she 
certainly could not have asked Dumbledore at the time, since he would 
not have known the answer, one (certainly Trelawney ought to) 
presumes.

So how does she know? I think, when Snape ended up one of her 
colleagues something like 2 years later, she drew her own conclusion, 
which is not necessarily correct.