@gwern @cinnamon_carter The point is not strict linearity, the point is eliminate the hidden assumption of miraculously improbable events.
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@NickSzabo4@cinnamon_carter It would use the amino acids and nuclear acids floating around, you know that. The usual abiogenesis proposals.
@gwern @cinnamon_carter A 150 base pair ecosystem can't catch, much less put to use, most of the amino & nuclear acids floating around.
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@NickSzabo4@cinnamon_carter Why does it need to catch to grow or spread or evolve w/o competition? Does not catching prove panspermia? -
@gwern@cinnamon_carter Many far more likely places in universe to find stable amino+nucleic acid soup than bombardment-era Earth. -
@NickSzabo4@cinnamon_carter Be that as it may, what does that have to do with linearity of genomes as clocks and that paper's model? -
@gwern@cinnamon_carter Linearity is just a good initial way to avoid "and now a miracle occurred" assumptions that plague these debates. -
@NickSzabo4@cinnamon_carter Arggh. No, the linearity drives the entire extrapolation beyond Earth in that paper! -
@gwern@cinnamon_carter Prokaryote-like fossils appear as soon as Earth bombardment ends. -
@gwern@cinnamon_carter Thinking about genomic complexity & chemical ability shows effective impossibility life originated then & there. -
@NickSzabo4@cinnamon_carter If it appeared before, how could you ever know? The bombardment censors observations. That was what I meant. - 12 more replies
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