IME there are several signals those afflicted use including 'extensive' research, 'watch this video', 'scratch the surface' 'do your own research' when it's clear someone decides what they want to believe then looks for any evidence to justify it.
I've received real fury when I prefer evidence-based research papers to a hokey video by a scientist with no expertise in the field or a medic who has been struck off or in one case it turns out is having a psychotic breakdown.
I think it's indicative of Dunning Kruger combined with an echo chamber of agreement by similarly ignorant people though I don't really understand the psychology.
I've seen research that indicates providing evidence or facts usually just reinforces the incorrect beliefs - anti-vaccinations even before COVID.
Perhaps belief and religion is a better framework rather than science where belief and faith is key and opposition reinforces and there is a need to convert others. Or perhaps party politics where hacks support the party line and follow it as it changes.
I was surprised at the number of people who instantly became experts in international trade relations then constitutional law during the Brexit process in the UK to reinforce the pro-Brexit position they was wanted to support.
I find the contortions COVID 'sceptics' sometimes adopt interesting too. Don't wear masks. It's 5G, even in regions or nations without 5G rollout. Don't use medicines produced by big Pharma. The latter had a wrinkle where two people I know are massively anti-medicine but it seems it's OK to use Big Pharma medicines provided mainstream science don't want those medicines to be used for the disease in question then it becomes OK (HCQ and Ivermectin) especially when there is a study showing no positive effect and sometimes significant risks as that is then evidence 'they' are trying to hide something. But as soon as there is an evidence-based study showing a positive effect (COVID and some steroids) then the medicine is off the table.
I really struggle with the induced amnesia about the positions they held before and the conspiracies or catastrophies that didn't happen, but with none of the recognition and rigour that science has that when evidence changes, the current theories or practice legitimately changes accordingly.
I cynically get amused when I see academics paddle in somewhat similar waters. They fight for the narrowest nuance in their field then often spout unsupported rubbish in fields about which they understand nothing (back in the day, a historian spouting rubbish about genetics, eugenics and intelligence). To be fair, they tend to do this much less than the social media/Youtubers.