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I'll add one more post with my best attempts at statements of certainty (a duplicate from the 'I don't know what I saw' thread):
In the hunt for exo-life discussion, I find three curious statements which can be stated with certainty:
1) the uniqueness of life to Earth can be instantly 'disproven' with the first confirmed exo-life discovery;
2) the existence of exo-life in the universe, can never be 'disproven' with multiple negative discoveries, no matter how vast in number these are;
3) purely mathematically speaking, the numbers of habitable environments throughout the universe, tells us nothing about the uniqueness or otherwise, of exo-life in the universe, until a single instance of exo-life is discovered in an exo-habitable zone.
Inference from beliefs taken from non-insular Earth modelled habitats, is what keeps the search going.
Cheers
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