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Originally Posted by Keltik
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Detection of remote spectral characteristics at hundreds of light-years distant, will still lead to inference only. Without verification of extant exo-life, there will only ever be correlations and inference.
Extrapolating from Earth-life's spectral data is extrapolating from an instance of one ... not a valid basis for exo-life determination.
'Bio-signatures' is not a definitive term, anyway.
Quote:
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Originally Posted by KJeltik
Don't be so rigid, is my advice. You never know what might be possible.
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Irrelevant.