Time turner question

[Robert Jones]

No: HPFGUIDX 91724

--- In HPforGrownups at yahoogroups.com, Troels Forchhammer 
<t.forch at m...> wrote:
> <http://www.hogwarts-
library.net/reference/potterverse_faq.html#time_travel>
> 
> HTH ;-)
> 
> /Troels

Bobby:  I read your explanation and I like that you can explain the 
book without appeal to the ideas that time repeats itself or that 
time-travelers can change history.  

But I still do not understand the Patronus problem. "Old Harry" sees 
the Patronus and so "Time-Traveling Harry" can later remember that 
he can produce it.  "I knew I could do it this time because I'd 
already done it."  But neither Old Harry or Time-Traveling Harry had 
done it before.  The two Harrys just see the same event from 
different perspectives.  The Patronus was produced only once. So 
it's not clear why Time-Traveling Harry should now have any "more" 
confidence that he can do it based on what Old Harry saw.

But in any case, my bigger problem is that JKR is that only 
physicist in the Potterverse, and what she says goes.  If she says 
that time-travelers can change history -- by killing their former 
selves -- then time-travelers can change history. (This leads to my 
objections to time-travel as a plot device in the Book 7 that I 
stated in a post a month ago.)  And desparating arguing that 
Hermione was mistaken in what she said to Harry or that the Ministry 
of Magic told McGonagall to lie to Hermione to keep her from abusing 
time-travel (I've read that elsewhere) doesn't change that fact.