What is the greatest HP prediction ever?

[Neri]

> Kemper now:
> I have no proof, but my brother predicted that the reason why 
Voldie 
> lived was because part of his soul was saved outside of his body.  
> He had no idea that it would several parts of his soul, but he was 
> on the right track.

Neri:
Actually I vaguely remember at least one similar prediction here in 
HPfGU, although I can't remember by whom, and I can't find the post. 
Does anyone know what it was?

However, merely Voldy hiding his soul (or his heart or whatever) 
outside his body doesn't strike me as a great prediction in itself, 
since this is a common plot device in fairytale and myth. If somebody 
actually predicted that Voldy had several of those soul containers, 
and that the diary was one of them, now this would be a very serious 
contender.

Personally I'm impressed by predictions done using the power of 
deduction, rather than some lucky shot. For example, before HBP we 
argued endlessly about how Snape convinced Voldemort to take him back 
as a double agent (I was completely off the track myself – I thought 
only some magic could explain it). I think it was Steve (bboyminn) 
who deduced that the only way Voldy would take Snape back is if it 
was Voldy who sent Snape as a spy to Dumbledore in the first place. 
But my memory might be failing me and I can't locate the specific 
post. Steve, if you're reading this, do I remember correctly?

Neri