How reliable are pensieve memories?

[Eddie]

No: HPFGUIDX 157942

Eddie:
> Since pensieve memories are _somebody's_ memories, is it safe to
> assume the memories are how the donor remembered the event?  We have
> never seen  the same pensieve scene from more than one perspective,
> have we?
> 
> In OotP, "Snape's Worst Memory" may only be how _Snape_ remembered the
> event, not necessarily how it actually occurred.  In that particular
> scene, we hear James, Sirius, Remus, and Peter talking about the
> O.W.L. they just took, including reference to Remus being a werewolf.
>  Would Snape have actually been able to hear that conversation and
> have it captured in his memory?  Or is these details that Snape has
> "added" after the fact based on information gathered later?

Eddie:
In partial answer to my own question:
http://mugglenet.com/jkrinterview3.shtml -- answer from JKR is, "what
you remember is accurate in the Pensieve."

I'm not sure that answers how Harry could hear a conversation that was
supposedly out of earshot of Snape, but JKR can do what she wants, I
guess.

Eddie