Snape's canon opposite/ Proving loyalty (Re: Hearing from the Great Middle)

[vmonte]

No: HPFGUIDX 140199

zgirnius:
Yes, I recall reading Finwitch's post (number 139525). I think it could
certainly have been done at that time. But this would mean that TR
would have had to modify DD's memory, as described in that post. And in
such a way that the Pensieve memory appears almost perfectly normal.
This seems a tall order.

I could also see TR just thinking about doing the curse right then and
then coming to his senses. And casting the curse out of Dumbledore's
sight. It's not exactly like cursing a person or an item, is it? For
that I would imagine you need to be pretty close to the object. But
the "DADA Position" is a rather intangible thing to curse, so I could
imagine that it might be doable from anywhere on the Hogwarts grounds,
really.

vmonte:
No, something definitely happened there. It may have been something 
else, but there would be no reason to add the bit about the movement 
if it didn't mean anything.

Vivian