Paranoia

paranoia (noun) : 1. a mental disorder characterized by any of several types of delusions in which one basically acts like an idiot believing either that one is a superhero instead of an ordinary person, or that one is dying of cancer instead of suffering from a cold; 2. a healthy understanding of the world
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Why try to solve this when all that will happen is that you'll begin to see the sense in what the paranoid is saying?

As a recent television show tagline says, "Not all conspiracies are theories."

Anyone who has experienced the fears of a hypochondriac or mysophobe begins to question whether life before exposure to that person represented simple blissful ignorance or blatant stupid ignorance. (Note that the paranoid always will tell you it was the latter.)