[Ed. – At the first sign, take a stiff drink. Then call the world back in the morning.]
A mass hysteria happens when the public gets a wrong idea about something that has strong emotional content and it triggers cognitive dissonance that is often supported by confirmation bias. In other words, people spontaneously hallucinate a whole new (and usually crazy-sounding) reality and believe they see plenty of evidence for it. The Salem Witch Trials are the best-known example of mass hysteria. …
The most visible Mass Hysteria of the moment involves the idea that the United States intentionally elected a racist President. If that statement just triggered you, it might mean you are in the Mass Hysteria bubble. The cool part is that you can’t fact-check my claim you are hallucinating if you are actually hallucinating. But you can read my description of the signs of mass hysteria and see if you check off the boxes.
If you’re in the mass hysteria, recognizing you have all the symptoms of hysteria won’t help you be aware you are in it. That’s not how hallucinations work. Instead, your hallucination will automatically rewrite itself to expel any new data that conflicts with its illusions.