lmao if there is a near-perfect litmus test for how insane a person is - probe them on if they see a chiropractor and/or have any feelings about them.
Thankfully my parents both work in medicine - with my dad doing radiology so I've always known chiropractors are make-believe. But, for example - in high school - I knew a cheerleader who'd go weekly to her 'family chiropractor' (truly don't understand how, as a parent, you'd wind up bringing your entire family to a chiropractor and don't realize its a racket lol. how does your entire family have back issues? ma'am your son is 3) and surprise surprise she was also the one who spent 15 minutes silently crying at her desk with her hands over her ears when we hit the evolution powerpoint in 10th grade Biology while the rest of the class & teacher rolled our eyes collectively lol.
Reminds me of a talk I had with someone about evolution. I pointed out that you can see birds or bugs that are clearly related to eachother but different, they said those were just microchanges and that didn't prove anything, and I pointed out that those microdifferences would snow ball over time. Apparently no one had explained it to her in that way because she immediately had this look of genuine distress like her entire worldview had just come crashing down.