the fraction of configurations capable of producing complex chemistry, stable stars, and long-lived planets is extraordinarily small. The fraction capable of producing sentient technological civilizations is smaller still. This gives us a distribution of expected civilizations per configuration that is overwhelmingly concentrated at zero, with a thin tail of configurations that produce any sentience at all
This is a strong assertion that requires justification. How much more fine-tuning does it require to get a universe where 1 of every 1000 stars has a planet that can support intelligent life than a universe where 1 of every 10^30 stars does?
This is a strong assertion that requires justification. How much more fine-tuning does it require to get a universe where 1 of every 1000 stars has a planet that can support intelligent life than a universe where 1 of every 10^30 stars does?