In the back issues from the 1980s(1990s?) of the British Journal of Psychiatry there was a letter asking if anyone else had encountered a patient who's paranoid delusions centred on the new domestic satellite TV dishes.
(, Tue 20 Sep 2022, 20:21, Reply)
www.bbc.co.uk/news/uk-england-london-62970523
The absolute certainty with which many hold the particular belief amazes me. No argument, evidence or demonstration will persuade them.
With the right delusions some have probably started religions.
(, Tue 20 Sep 2022, 22:39, Reply)