"Remember that the Mirror shows many things, and not all have yet come to pass. Some never come to be, unless those that behold the visions turn aside from their path to prevent them. The Mirror is a dangerous guide of deeds."

This is also a good statement about prophecies in Arda in general. Not only are they often able to be read two wildly-different ways - take the naming of Arvedui 'Last-King' of Arthedain, who would be the Last King of Arthedain either because he would claim Gondor and rule over a Reunited Kingdom... or because his realm would fall utterly - but are also very much of the 'if you try to prevent it, that may be the cause of it' variety.

There's also the nature of tercen, elven 'Insight' (which is what Galadriel has). It's not so much mind-reading as... oh, heart-reading? I mean, she didn't look at Boromir and go 'hey, mate, I can see you want the Ring; I think it's time you went a different way'. She'd probably pick up on Amy's relief that she's rescued Gandalf, her worry that she won't be able to save Boromir, and her confidence that the Ring will be destroyed. Maybe also her probably-ambiguous-at-this-point feelings about being in a book.

I think Galadriel will use prophecy as her frame of reference. She'll see the things that Amy knows happen as prophecies: one has been proven false (or at least seems to have been); the others are yet to come. Perhaps they'll never happen. Perhaps they're pretty much fixed. Perhaps Amy could meddle with them. Who knows the will of Iluvatar?

One thing I think she wouldn't do is show Amy the Mirror. She can't be trusted! She had a prophecy, and she actively worked to negate it. That's precisely what Galadriel warns Frodo against. But that doesn't mean Galadriel won't use her own apacen (Foresight, which is heavily implied to be what 'powers' the Mirror in the first place) to peek ahead... and maybe drop a couple of hints. She may want to keep from meddling, but she is a Noldo; we they have difficulty with restraint. ;)

hS