Immortality and the sons of Elrond

[Aiwendil]

Originally Posted by Mithadan

Manwe's speech, quoted above suggests the answer here is no.

But unless I'm much mistaken, that quote comes from QS37, which was written before Elladan, Elrohir, and Arwen were invented.

I think that in light of that fact, it's much easier to suppose that Manwe's speech is to be amended than that Tolkien's statement in Letters was blatantly false.