Lex Fridman: belief

Transcript context

…Yeah. If we, normal humans saw 100 experiments, and we knew that at least one time there was a successful human civilization built we would say for sure, in 100 you’ll get another one. Yeah. So, that’s why these kinds of arguments you have to be careful of what they can do. But I felt like what this paper showed was that the burden of proof is now on the pessimists. So, that’s why we called it the pessimism line. Throughout history, there’s been alien pessimists and alien optimists, and they’ve been yelling at each other, that’s all they had to go with. And with Giordano Bruno in 1600, they burned the guy at the stake for being an alien optimist. But nobody really knew what pessimism or optimism meant. We thought this was like the plank length, this was the plank length of astrobiology. Gave you an actual number that if you could somehow calculate what the probability of forming a technological civilization was, this thing shows you where the limit is. As long as you’re above 10 to the minus 22, then you actually absolutely, it has occurred in the history. Other civilizations have occurred in the history of the universe.…

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