Okay... but do we agree that the degree-of-belief distribution for the first roll is (1/3, 1/3, 1/3), whether it's a fair die or a completely biased in an unknown way die?

Because I'm pretty sure that's what Manfred's talking about when he says

There is a single correct distribution for our starting information, which is (1/3,1/3,1/3),

and I think him going on to say

the "distribution across possible distributions" is just a delta function there.

was a mistake, because you were talking about different things.

EDIT:

I thought so too, which is why I asked him what he thought a delta function in the distribution space meant.

Ah. Yes. Okay. I am literally saying only things that you know, aren't I. My bad.