another moment of confusion

[quigonginger]

When you look at "mistakes/perpetuating mistakes" it says to reject 
things that we know now that weren't known at the time (eg the "married 
couple" to whom Sirius refered).

How far do we take that?  And what effect does it have on predictions?  

For example, there are a TON of "Who will die in book 5" posts.  We now 
know who it was.  (sniff) so these go under predictions, right?

The entire 4th man Avery ship sank, but that's still good to code, 
right?

What kinds of things do we reject? 

Ginger, the Eternally Confused