Mike Gascoigne
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I have already answered this by saying that thermodynamics is against the whole process, not just the individual components. But you don't seem to be satisfied, and you keep nagging me about it, so I'll try and elaborate on it further.Originally posted by UTEOTW:
Well, let's just start this by asking my standard question. Can you state one step in the evolution of man from our last common ancestor with the other apes that is prevented by the second law and why this step is prevented?
First of all, it isn't clear what you are asking for. If you are asking me to identify something specific, that never evolved because thermodynamics prevented it, then you are asking for philosophical absurdity. It's like the man who sits in the road to prevent the elephants from coming, and someone says "But there are no elephants" and he says "That's right, it works, doesn't it?"
On the other hand, if you have got your own list of supposed intermediaries (including forgeries such as Piltdown man) and you want thermodynamic reasons why they should not develop, the answer is that whatever evolves from the ape-like hominids must be thicker than the hominids themselves because their brains have disintegrated.
Now, addressing the whole system, which is a much more reasonable approach, we are sometimes told that evolution is thermodynamically feasible because energy is captured from the Sun, and is converted to chemical energy through photosynthesis, and then you have the capacity for a loss of free energy all the way down the food chain. So far so good, but first you need the plants, which are incredibly complex, probably more than anything else in nature. They have the capacity to grow and multiply using nothing more than sunlight, water and minerals from the ground. The first plants had to assemble themselves in the absence of a thermodynamic input, and without them the rest of evolution is impossible. So now you have the thermodynamic reason why humans could not have evolved from ape-like hominids. They would have to survive for millions of years with nothing to eat.
Mike