Ok, where I say 'alien', imagine I said 'extra-terrestrial'. We know the probabi... | Hacker News

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		AkThhhpppt on July 20, 2012 \| parent \| context \| favorite \| on: Physicists solve Casimir conundrum Ok, where I say 'alien', imagine I said 'extra-terrestrial'. We know the probability of the universe evolving intelligent life from scratch is 1. We know nothing about the probability of the universe evolving intelligent life from scratch twice, and the Fermi paradox implies we're very unlikely to ever find out more.

JoeAltmaier on July 26, 2012 [–]

Disagree. No reason to dismiss multiple intelligent lifeforms on one planet as not 'from scratch'.

The operative word is 'intelligent'. Probability of life is unknown; but that's not the issue presented.

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