What is real? Is the physical universe real? Does it exist? Chances are, simply asking these questions on some level seems ridiculous to you (unless you were a philosophy major). The answer probably is, “Of course the physical universe is real! What kind of stupid question is that?” But the problem is that your answer, which seems so patently obvious to you, is not so obvious to people who hold a different worldview. So, for example, many Native Americans have historically believed that the physical universe is secondary to the world of dreams; in this culture, dreams are more “real” than the
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