Another "Not Really DD" Theory

[crystalonyx3]

No: HPFGUIDX 134902

I never thought that was really DD thoughout the whole book. 
Remember when he asked HP if he'd managed to get the true 
memory from Sluggy'? When HP told him he hadn't gotten 
it DD reacted in what I thought was out of character. He mentioned 
HP's cunning.  Cunning?! Doesn't that sound more like a LV (or Snape) thing to say.  The real DD knows that Harry is not cunning.  That boy never divised a plan in his whole life.  HP always just jumped in head first and hoped for the best.  

There were a few other times in  this book that DD didn't sound like his usual self. Like when he first found Sluggy.  He poked him really hard.  Would DD have done that? And what did he really do when he went to the bathroom? Pee? I think not!  Oh,Oh, and when DD had to drink that liquid.  He said "It's all my fault."  What was all his fault? (What if DD and Snape traded places?)  Why were we told that Snape felt guilty about HP's parents? When DD Drank that liquid he cried and said- "It's all my fault," and for that matter, it could have been Wormtail.  He and Snape were living together at the begining.  What if Wormtail reformed?

The rational part of me says that it is what it is..... Snape is a 
dirty muther-shut your mouth.  DD is dead and HP is going to loose 
everyone close to him before this is over (is this still supposed to 
be for children?). But the part of me that gets excited at the idea 
of magic being real believes that DD is locked up somewhere with 
chunks of his beard missing and when he fights his way out of that 
imperious curse I wouldn't want to be the deatheater on duty that 
night.

crystalonyx3