Quote:
Originally Posted by higginsdj
Hmmmm, but would there be any habitable planets if we weren't here?
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Strong Anthropic Principle...the fact that we are here means there must be habitable planets, otherwise it would be a moot point. If we don't exist, neither do they.
Weak Anthropic Principle...the chances of a planet being habitable isn't necessarily a condition of our presence, but their observation by us means that fact is known and therefore they must exist, for we inhabit one of them.
Take you pick