Paradox of Time Travel in PoA

[davenclaw]

No: HPFGUIDX 132048

--- In HPforGrownups at yahoogroups.com, "delwynmarch" 
<delwynmarch at y...> wrote:

> But those people, if they are indeed there, can not *change* any 
> event that happened in "their" past: they can only participate in 
> them.

Then why is everyone so worried about your past-self seeing your 
TT-self when you go back in time?  Wouldn't it be the case that if 
that were going to happen, your TT-self would already know it 
because it already happened?  And yet people do worry about this.  
So I think there is canon evidence that this theory is incorrect.

By the way, I don't have my book in front of me - does anyone know 
if, when Harry is in the hospital, before using the TT, anyone 
(Fudge, Snape, whoever) says anything which states or implies that 
Buckbeak had been executed?  If so, that blows the whole "time 
can't be changed" theory out of the water. I'll have to check on 
this later...

> You are making the past depend on the future, which is not 
logical.
> You are basically saying "Harry cannot be saved now because he 
must
> first decide to Time-Turn in the future". But that's not the way
> Time-Turning works.

I disagree.  I think it is clear that the past depends on the future 
with time-travel.  The past couldn't have occured as it did unless 
it resulted in Harry time-turning.

Let's consider a crazy scenario.
 
Hermione and Harry have time-turned, and they've gone into the 
Willow.  TT-Harry kills Pettigrew before past-Harry knows what is 
going on with Sirius being innocent.   Past-Harry thinks some dark 
magic is at work, so he tries to kill TT-Harry, but before he can, 
TT-Hermione kills past-Harry!!!!  Now, tell me, what do you think 
would happen to TT-Harry?
 
 
> Harry is saved in the present because a second set of Harry and
> Hermione appeared out of nowhere in his PAST. The present 
depends on the past, now that makes sense.
 
Yes, but they get there because of something they do in the future.  
You keep ignoring the use of the time turner as a discrete event in 
the timeline that occurs after the original series of events.


Based on what everyone is saying, it is IMPOSSIBLE, you are telling 
me, that original-Harry could see TT-Harry do something, and then 
for TT-Harry, with the knowledge and understanding of what he saw TT-
Harry do when he was still original-Harry, decide to do something 
different - he can only do what he already witnessed himself doing.  
Is that right?

- davenclaw