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There is a lot of interest in calculating the probability of life on earth,
We don't know what conditions are necessary, but we have a very good idea of what conditions are sufficient, so our best guess is likely to be an underestimate.
If you truly believe this to be true, please specify the conditions that are sufficient.
Quote from: Ophiolite on 27/02/2015 21:06:07If you truly believe this to be true, please specify the conditions that are sufficient. Those present on Earth about 5,000,000,000 years ago. Or Divine Providence. There being no evidence for the latter, we must assume the former. In either case, the probability of life existing elsewhere is clearly nonzero.
Creationists often claim that the chances of a modern enzyme forming by random means are astronomically small, and therefore the chances of a complete bacterium (which is composed of hundreds or thousands of such enzymes & proteins) is so near to impossible that it would never happen in the 13 billion years or so since the universe took shape.