I think you need to make a clearer distinction between a hypothetical perfect bayesian reasoner, who would know all possible hypotheses from the beginning and only narrow them down through observation, and the things humans do to try to approximate that, which will sometimes involve going back and changing the prior when a new hypothesis has been thought of.
I think you need to make a clearer distinction between a hypothetical perfect bayesian reasoner, who would know all possible hypotheses from the beginning and only narrow them down through observation, and the things humans do to try to approximate that, which will sometimes involve going back and changing the prior when a new hypothesis has been thought of.