Harry's dead (short lifeline)

[caesian]

No: HPFGUIDX 123612

In PoA, Professor Trelawney wastes no time telling Harry he has the 
shortest life line she has ever seen.

We all know that poor T is blinkered.  She can't SEE the future even 
when she actually does.  I.e., she can see the future (e.g. Sirius) but 
almost always misinterprets it (e.g. The Grim).

Her observation got me thinking - what if Harry does have an incredibly 
short life line?  For example, the life line of someone who died in 
infancy.

What if Harry, the Boy Who Lived, didn't.  This is weird, but bear with 
me.  There has been some speculation as to what happened when the curse 
'rebounded', or whatever it did.  We wonder what Harry and Voldemort 
might share as a result.  A common technique in logic is to get the 
listener to agree to the premise without actually considering it.  "How 
did Harry survive?" is asked again and again, and so we wonder.  But 
the question assumes that he did survive.  Maybe this is not quite 
true.  I know that death is permanent in the WW, and so technically 
Harry can't have died.  But what if he didn't survive on his own steam. 
  What if Harry and LV now share a common mortality.  In other words, 
Harry actually would have been killed, but because his life became tied 
to Voldemort's by the 'rebound' (or whatever), when Voldemort was able 
to resist death, Harry resisted death as well.

In that scenario, when Voldemort dies, so does Harry.  Or perhaps DD's 
glint of triumph was not related to Voldemort's defeat, but to an 
increase in Harry's likelihood of survival...

Or, maybe not.
Caesian