Sirius Luring Snape

[dumbledore11214]

No: HPFGUIDX 106500

> 
> Lissa:
> 
> I'm completely confounded as well as to how Dumbledore shut Snape 
up (aside 
> from my purely speculative former-friend-of-Lupin theory), but I 
was 
> talking to a friend the other night and she pointed something out:
> 
> Did Sirius actually have to have a conversation with Snape to get 
him to go 
> into the Shrieking Shack?  I can't remember if it's been 
specifically 
> stayed or not.

snip.


> Anyway, the point was Sirius could have been more "subtle" (if 
that's the 
> word you'd use here) than throwing his arm around Snape's shoulders 
and 
> saying, "hey, buddy!  Let's go to this cool spot I found!"
> 
> But afterwards... I'll join the legions of the confused!


Alla;

The problem is that it looks like Sirius did have a conversation with 
Snape and  incredibly enough Snape bought it and went there. There 
must be something else, which we don't know yet.

Here is the quote:

"Sirius thought it would be -er-amusing, to tell Snape all he had to 
do was prod the knot on the tree-trunk with a long stick, and he'd be 
able to get in after me. Well, of course, Snape tried it - if he'd 
got as far as this house, he'd have met a fully grown werewolf" -PoA, 
brit,ed., p261

Snape believed Sirius' words of his own free will? If it is so, then 
he was an idiot, which even I doubt. 

Why does remus say -"of course Snape tried it?" Why is he so sure?