Who conjures the Prongs Patronus?

[drtruman]

No: HPFGUIDX 53328

> I (Norm) wrote:
> 
> > Doesn't Harry1 *have* to cast a successful Patronus in order to 
be 
> > able to return later (as Harry2)?
> 
> Now Phyllis:
> 
> I'll attempt to help.  Harry2 doesn't "return later" to save 
Harry1.  
> The events are happening simultaneously, even though we see one 
> following the other.  Once Harry and Hermione turn the time-turner 
> back, they are re-living that time *during that time.*  Which is 
why 
> the time-turner is so dangerous - as Hermione says, a witch or 
> wizard, in the surprise of seeing themselves, might kill their past 
> or future self by mistake.

I follow the point about the dangerousness of seeing oneself again. 
I also follow that when they go back, they are re-living the earlier 
episode. What I'm still missing is this: doesn't Harry1 have to 
survive the dementor attack in order to *then* use the Time-Turner to 
alter that first version of events? Given that the principle of the 
Time-Turner is, after all, the ability to go back in time from a 
certain point in the future -- in this case, once they've made it 
back to Hogwarts -- don't they have to get to that point in order to 
then alter the way things happened before? And if the dementors have 
applied their kiss to Harry (and Hermione, to say nothing of Sirius), 
I somehow doubt H&H are going to be in a position to use the Time-
Turner to then prevent the dementor's kiss from being applied.

Put it another way: the dementors don't use the kiss, they use a 
good, old-fashioned, Muggle pistol. Bang bang, you're dead, Harry. 
How on earth (how in the Potter-verse?) can Harry, using the Time-
Turner, alter this history if he is killed?

I hope I am missing something that's completely obvious, because 
otherwise I don't get this.

Norm