I do think that for good faith arguments the Internet has been very successful in removing unintentional falsehoods -- there's a lot less of the "Eskimos have 1

I do think that for good faith arguments the Internet has been very successful in removing unintentional falsehoods -- there's a lot less of the "Eskimos have 100 words for snow" nonsense than there used to be because people can easily check that that's a myth rather than just repeating something they once heard. But obviously things are different when people are trying to promote a falsehood even (or even especially) one they know to be false.