So far, all we see is Richard not aging.

We know he has jumped timelines.

We know that Ben can jump timelines.

We know that Locke doesn't seem to be able to die.... or at least is able to cure self.

We know Sun got pregnant on the island.. therefore, her husband is healed from sterility.

We know dead people do NOT stay dead .. and/or, reappear.

maybe we should start a list on another thread. Seems to be a more simple solution to getting absolutes.

I still think that it's possible that Richard may be Locke's dad... however, I do not KNOW he is....

/me starts a thread, "WE KNOW".. hehehe