Why Dumbledore trusts Snape -- a theory

[pippin_999]

No: HPFGUIDX 42050

--- In HPforGrownups at y..., Adia <atonement24 at y...> wrote:
> I'll begin with a quote to set the mood...
> 
> ' "What makes you think [Snape had] really stopped
> supporting Voldermort, Professor?"
> 
> Dumbledore held Harry's gaze for a few seconds, and
> then said, "That, Harry, is a matter between Professor
> Snape and myself." '
>      -- 'The Pensieve', Goblet of Fire, paperback, UK,
> pg524
> 
> ***

Could be that Fawkes had something to do with it...Dumbledore 
tells Harry:

"You must have shown me real loyalty down in the Chamber. 
Nothing but that could have called Fawkes to you" --CoS Ch.18
Maybe Snape was able to call Fawkes.

Pippin