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In principle, sure! "Nullius in verba" and all that. But where I think this is interesting and most important is for those pieces of knowledge whose scale / cost make independent confirmation firmly outside the reach of any but the most well-resourced of agents. I think the subject of vaccine safety exemplifies this well. There are only a tiny number of people in the world who, realistically, can independently kick the tires on whether vaccines do / don't work or whether they are / aren't safe. Vaccine believers / skeptics are basically all just left to take someone else's word for it.

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