dunno what "TFA" refers to here, but it seems like we're heading into a argument regarding epistemology, which is not a discussion that HN handles well.
IMO "truth" is distraction here because what is at stake here are people's values, not their understanding of math and physics. When people worry about "post-truth", they're worried about liberal values no longer being the unquestioned default. It is absolutely a marketplace, and if people switching marketplaces en-masse makes it harder to launch rockets and develop vaccines, then it probably means those activities are making people net unhappy. People are a lot smarter than we give them credit for, even the dumb ones.
IMO "truth" is distraction here because what is at stake here are people's values, not their understanding of math and physics. When people worry about "post-truth", they're worried about liberal values no longer being the unquestioned default. It is absolutely a marketplace, and if people switching marketplaces en-masse makes it harder to launch rockets and develop vaccines, then it probably means those activities are making people net unhappy. People are a lot smarter than we give them credit for, even the dumb ones.