This is a question about philosophy. Reading the beginnings of Wikipedia's timelines of Eastern and Western philosophers, we find Thales, Anaximander, Pythagoras, Guang Zhong, Confucius, Sun Tzu and a few more as the first philosophers. By the time these guys lived, there were other written non-fiction (or allegedly non-fiction) works. What is the difference between philosophy and the other non-fiction stuff (especially in those times)?
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