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Azathoth123 comments on Why appearance matters or “to behave as if” - Less Wrong
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Comments (17)
How exactly does this differ from a Bayesian prior?
Um, there is a lot of debate about whether this effect exists.
The key in discussing prejudice as something bad is to distinguish it from general Bayesian reasoning, which is good if done right.
Your question points to the failure of the OP to distinguish between good and bad Bayesian reasoning.
Am I not allowed to call it "prejudice" if it's like a Bayesian prior?
It's not a matter of "allowed".
Given the nature of the website it would make sense for you to analyse the relationship between what you are saying and Bayesian priors if you want to convince people.
In practice, it differs in that once an opinion is formed it's sticky and contrary evidence tends not to result in updating.
Or, it starts from a poor probability assignment in the first place.
Basically, prejudice as a bad thing is poor Bayesian reasoning, not all Bayesian reasoning. Unfortunately, many opponents of prejudice would insist on throwing out some good Bayesian reasoning as well.