Easily communicated in a "ceteris paribus, having communicated my evidence across teh internets, if you had the same priors I do, just by you reading my description of the evidence you'd update similarly as I did when perceiving the evidence first hand", yea that would be a tall order.

Unfortunately, I've seen people around here through the Aumann's agreement theorem in the face of people who refuse to provide it. Come to think of it, I don't believe I've ever seen Aumann's agreement theorem used for any other purpose around here.