royf comments on What is Evidence? - Less Wrong
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No, correct beliefs should only be contagious among honest folk who believe each other to be rational and honest. If I make the claim that The FSM is dictating these words to me, you would probably think me lunatic or liar. But if I truly can correctly recognize when I have been Touched by His Noodly Appendage, then my beliefs are entangled with reality but, understandably, not contagious. Furthermore, it would be perfectly rational for me to believe this revelation and at the same time not to consider it evidence for others. The point is that some beliefs, certainly the more extraordinary of them, should not be contagious, except through evidence as raw and unprocessed as possible.
Also, entanglement is necessary but not sufficient for correct beliefs. The fact that my beliefs contain information about the world is not enough for them to be correct. For example, if I misread the photon pattern, I could think that my shoelaces are tied when they are not, and untied when they are tied. This still has the same amount of entanglement, the same amount of information, yet the beliefs are incorrect.