Dumbledore does Lie-Part II, Snape Turned

[Neri]

No: HPFGUIDX 159874

> > Neri:
>  > But most of all, at this point when Dumbledore hears the prophecy, 
> he 
> > has no way to know it's a true prophecy. He has already reached the 
> > conclusion that Trelawney is a fraud.  
> 
> Hickengruendler:
> 
> And yet he changed his decision and hired her on the spot, to bring 
> her to Hogwarts, where she was. Therefore he might not have been 
> sure, if it really was a true prophecy, but at the very least, he 
> considered the possibility, and therefore I assume he would do almost 
> everything to keep it's content a secret from Voldemort.
> 

Neri:
Well, IIRC we don't really know that he changed his decision and hired
her "on the spot". This decision may have taken him two weeks, or two
days, or two hours, or just two minutes. The point is, it took him
longer than it took Aberforth to "throw Snape out of the building" and
Snape "hastening to tell his master". I can buy that.

Dumbledore may have decided it's worth hiring Trelawney just to keep
an eye on her. For all he knows she might be making a prophecy on the
Dark Lord every evening, and he has no idea if they come true or not.
Maybe just the ones she makes on Fridays do. Only months later, when
Harry and Neville are indeed born in the end of July, Dumbledore has a
real reason to think the prophecy is true. This is probably when
Voldemort too decides to act on it. 

Neri