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I'm not sure this is a real counterpoint: with no microscopes or tools, they figured out airborne infections and learned to stay away from dead and rotting things, as well as gases emitted by those who were sick (the same way we're not walking around inhaling peoples' coughs).

Of course it's "almost correct", and the theory had holes which we've gotten better at. But the old 'wrong' version gave people a good way to act when faced with limited knowledge.

In the diet arena, we are still very much faced with limited knowledge.



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