`I'm looking for some advice and particularly literature pointers for a`

`question about the Bayesian stance. I'm interested in what approaches`

`are suggested for handling the case where one's prior is qualitatively`

`wrong.`

`For example, imagine that I have chosen a normal distribution for a`

`random variable, and when the observations come back, they are bimodal.`

`What does the Bayesian philosophy say about cases like this?`

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`Unless I have previously considered this possibility, I can't sensibly`

`update my prior to a posterior, and as I understand it, is critical that`

`my prior be independent of the observations, so revising my prior before`

`I compute the posterior isn't kosher.`

`I'm sure that there must be a literature on this in statistics and`

`philosophy, but I don't know how to find it. Maybe there's a jargon`

`term that I just don't know.`

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