Thanks for your summary. Indeed it is very hard to explain these ideas, because so many terms are still vague, missing or explained in often contraditing ways.

I think, indeed, that with "permanence" i've made the mistake to pull that together with "immutability". My first draft had them as different points, but I found that this made the explanation too complex. So I decided to go only for "immutability" and to move the "permanence" under there.

In your definition of permanence (the correct one, BTW) this is not the same. Permanence needs economic incentives. As we can see with IPFS (and it not -yet- being permanent in practice). Immutability, however, needs (i) cryptography and (ii) conflict resolution and (iii) permanence. Which implies "being public". As I tried to explain.

Or did I misunderstand your comment, and do you mean immutability as well as permanence?