It&#x27;s not just flat-Earthers. I suspect this is reflective of some broader psychological phenomenon- what the article calls &quot;conspiracy-theory psychology&quot;, but I don&#x27;t think that quite covers it. I recently came across someone who was just as religiously convinced that JavaScript was not Turing-complete. No amount of mathematical argument could convince him otherwise. He didn&#x27;t claim any conspiracy, just had an utter refusal to consider any evidence. It was surreal.