I don't know what (1) means
(1) is the prior I would have if I had never inspected and analyzed my prior. It is a path not taken from prior (3). The point of introducing it was to point out that I really believe (2) is better than (3), as opposed to (2) is better than (1) (which I also believe, but it isn't the point).
Does "your prior" refer to (A) the prior you identify with, or (B) the prior that describes your actual beliefs as you process evidence, or something else?
If (A), I don't understand:
This might be a process of figuring out what your prior is, but the approximations along the way are not your prior
If (B), I don't understand:
If you have a concept of prior (2), and wish to get better at acting according to it over time, then (2) is your real prior.
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