What is the Doomsday Argument? (Closer to Truth)

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source: Closer To Truth 2016年10月10日
The Copernican Principle asserts that humans are not special, that we should expect to find ourselves in an ordinary place or position. But if humanity continues for billions of years, we today would find ourselves extraordinarily early in human history.
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Nick Bostrom - What is the Doomsday Argument? 5:52
John Leslie - What is the Doomsday Argument? 6:06
Martin Rees - What is the Doomsday Argument? 3:42