This confusion about the truth usually begins to disappear as children grow up and see that there are not only observable facts, but also collectively observable knowledge that is difficult to verify but must nevertheless be taken on trust. The idea that the Earth is (roughly) a sphere and orbits the sun is pretty much universally accepted, but very few know the science that proves it. It is taken as a matter of faith as part of our established store of knowledge. It struck me as I argued with my daughter that the collective store of trusted knowledge is dwindling, despite the so-called information revolution. Adults, like children, tend towards the irrational, and the internet has become an immense tool for facilitating that tendency.