From Newsgroup: rec.arts.drwho.moderated   
   From Address: solar.penguin@gmail.com   
   Subject: Re: The way River Song won't be fixed   
      
   Ken Arromdee wrote:   
      
   > In "Turn Left" the bug creates an alternate timeline where the Doctor dies   
   > in 2006.   
   >   
   > If the Doctor dies in 2006, he doesn't die at the start of the 2011 series   
   > (whether as flesh or real).   
   >   
   > The Doctor's death at the start of the 2011 series is a fixed point.   
   >   
   > Therefore, the bug *can change fixed points*.   
      
   But can it change them _after_ they've become fixed?  What if it can   
   only change not-yet-fixed points?   
      
   If fixing points works in a Schroedinger-style way, then points become   
   fixed when they (or their effects) are already known by time   
   travellers who are going to have been affected by them.  So in this   
   case, the Doctor's death probably only became fixed when Amy and Rory   
   witnessed it.   
      
   Alternatively, if you don't like that theory, remember that the bug   
   was working for the Trickster, an evil, powerful, god-like alien from   
   the Sarah Jane Adventures.  The bug might only be capable of changing   
   fixed points with the Trickster's help.  And since the Trickster wants   
   the Doctor dead, he's not very likely to offer that help!   
      
   >   
   > I'm sure there's a way for the Doctor to sic that bug on the Silence and   
   > change the timeline to fix the whole River Song mess.   
      
   Nice idea, but the mess is to big to be fixed that easily.   
      
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