Possible and realistically feasible are two different things is the point he was trying to make, I believe.
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Only when you take into account how many chances you get to repeat it. If you conduct the watch experiment enough times it will happen eventually.
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But the most likely outcome is that anyone who cared enough to continue the experiment would have died out before it generated the particular outcome. Moving back into the topic of evolution, the idea is that it would be highly unlikely that those conditions would be satisfied before the heat death of the universe or what not. That isn't necessarily what I believe, just trying to shed some light on his original statement.
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Without knowing the actual chance of evolution occuring, their stance is just speculation. I don't think they understand the amount of times living things have reproduced. It would be such a massive number we couldn't write it down, and it would need to be a part of the calculation.
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Yeah, I understand. But in terms of evolution he is making a judgement of the it's of it occurring, but with no data to back it up. Considering the amount of times life has replicated on this planet (countless?) it has a massive impact on his claims.