Snape didn't make the Unbreakable Vow

[potioncat]

No: HPFGUIDX 161651

 "bercygirl2" <bercygirl2 at ...> wrote:

> He is left-handed. Go back and re-read all the books and notice how
> the words "left" and "opposite side" are constantly juxtaposed with
> Snape's name.
> The Vow was not made with his wand hand.
> Ergo, it was never made at all.
> 

Potioncat:
Now, this is the first new thing I've send about Snape since HBP came 
out. Can you give us some Book/chapter quotes for this?

I agree with Carol, that even if he was left handed, it wouldn't negate 
a vow...that is, since none of know how it works.