in reply to
Re^5: The fallacy of the *requirement* for read-only instance variables.
in thread The fallacy of the *requirement* for read-only instance variables.
You're 180 degrees off in your first sentence. The whole point of that paragraph is you cannot use the object handle as the unique id. That's why I consistently use distinct terms like "unique id" and "object handle", to avoid this kind of confusion.
I started a reply and realized I was just repeating myself. I will be content to stand on what I've written already.