Nature of a Patronus / Snape's Patronus

[replicarter22]

No: HPFGUIDX 153492

Sue:
<snip> This leads us to a realy interesting point to ponder.  In HBP,
> chapter 4 we see Harry and DD standng in the Weasley's broom shed.
> DD says, "There are only two people in the whole world who know the
> full contents of the prophecy ... and they are both standing in this
> smelly, spidery broom shed." A spider is crawling on DD's hat. I
> believe this is SS, and this is what Jo was referring to when she
> said telling us Snape's patronus would give too much away.</snip>

RepliCarter:

This is my first post here, so I hope I'm doing this right. If I'm not please give me a heads 
up so I know how to correct my mistakes.

If I'm understanding the spider theory correctly, you are saying that Snape heard the entire 
prophecy. However according to Order of the Phoenix, Page 843 (Scholastic Edition)

"My - our - one stroke of good fortune was that the eavesdropper was detected only a 
short way into the prophecy and thrown from the building."

"So he only heard...?"

"He heard only the first part, the part foretelling the birth of a boy in July..."

It continues on from there, but that's the important bit.

Snape didn't hear the whole prophecy, so could not be one of the two people.