Galadriel - the matchmaker?

[Helkasir]

I think perhaps, having the gift of foresight, she saw that it would be futile to attempt to keep Aragorn and Arwen apart. Elrond, not having this gift, could only look at his own feelings on the matter.

... that made me think of an error in the movies. The trailer has Arwen say "You have the gift of foresight... tell me what you see!" But I know elrond does not have it, so that's a glaring problem for Arwen....