Nothing is particularly unsettling about the subjective manner in which people perceive reality. Sure, we see things differently from one another, and even from ourselves from time to time, but we still manage to come to a general agreement of what’s collectively in front of us and to share our perceptions with each other. Those deviating from this collective perception, people who see, hear, or feel things that aren’t physically there at all, are usually labeled crazy, victims of faulty wiring, etc. “Son of Sam” serial killer David Berkowitz, who heard voices, and Nobel laureate John Nash,
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