Intelligence agencies usually rely on many unreliable sources, a few reliable ones, and interpretation of publicly available data; the interesting part is how t

Intelligence agencies usually rely on many unreliable sources, a few reliable ones, and interpretation of publicly available data; the interesting part is how they evaluate and interpret information from these different sources, which is one of the things Tetlock addresses. I am not sure that people actually want to know what is the truth; maybe one or two percent of the voters want to know the truth, but I very much doubt the number is much higher than that. People probably want to be told that what they believe is the truth when they go to these websites. There is a great deal of work on the subject of political ignorance (and self-deception), but I recommend the recent (and very readable) book "Against Democracy" by Jason Brennan for its summary of current evidence, and a proposed solution.