How about a twist?

[abergoat]

No: HPFGUIDX 159950

Louis wrote:

> Harry does get DD's pensieve and sees the argument between Snape
> and Dumbledore at the edge of the woods and Snape is vindicated. The
> argument was about how Snape being on the inside was more important
than Dumbledore living. 

Abergoat writes:

The bizarre thing is why does Dumbledore tell Snape he needs to
investigate his own house? Dumbledore suggests in the tower he knew it
was Draco along, which fits with your theory that Dumbledore was
insisting that Snape perform the task the vow required.  So what was
there to investigate? Draco refers to 'better help than you', does
Dumbledore want Snape to figure out who that help is? Is Snape not
really trying? How does this fit into the vow? Exposing the 'help'
would actually be going against Draco...so I guess that is a point in
favor of Dumbledore not knowing about the vow. But I don't really buy it.

Anyone have ideas what the investigation was about?

Abergoat