I never moved any goalposts. I always had in mind both the question of how advanced intellects would evolve in hot ocean trenches, and the question how those hypothetical advanced creatures could safely get to the surface and look at the heavens. But I’m being hit by different objections at different times from two or three different people, so it’s only to be expected that you’re not going to get a full and tidy order of exposition right from the start. This is a barroom conversation, not a planned treatise.
If you want a planned treatise, have a look at Denton, some of whom you’ve read. I’m convinced by the argument in Fire-Maker that advanced technology is only going to be produced by surface-dwelling, multicellular, structurally advanced animals. But I’m open to any scenario you might propose in which advanced technology could grow up wholly in an undersea environment. The problem is that you are failing to provide concrete suggestions, and instead picking away on my statements on general grounds.
You are talking about the earliest forms of life, which, it seems, for 2 billion years or so were probably all unicellular. I don’t think you believe that one-celled critters at ocean vents invented technology, or even could have done so. I think you will admit that science and technology did not appear until the rise of man, which did not happen until life moved out of ocean vents and sub-crustal pools, and onto the continents, where things like controlled fire and metallurgy were possible.
Porpoises and octopuses may be smart in some respects, but they don’t have science, and they don’t have technology, and as far as we know, they don’t spend time trying to figure out their own ultimate origins. Science and technology were produced by land-dwelling beings. There are reasons why this should be the case.
I don’t think his evolutionary timeline is markedly different from that of most cosmologists, geologists, and biologists, so I don’t see what’s to be learned there. When I first read Denton’s Nature’s Destiny, my overall reaction was “This description of the history of the universe and life is just like Sagan or Jastrow, except that he is marshalling the same data to argue for teleology rather than antiteleology.”
Do you really believe it’s just evolutionary accident that science and technology emerged on the surface of the earth – that they could just as easily have emerged at the bottom of the ocean, or in hot mineral pools under the earth, or under a million tons of Antarctic ice? And that on some other planet somewhere, that’s where science and technology have evolved? If not, then what is your beef with Denton regarding the origin of science and technology?