"We are in a similar predicament with our understanding of the origin of life. Since we don't have detailed information on the exact steps we will have to be content with developing plausible scenarios based on information concerning conditions on the early earth around the time life originated nearly four billion years ago. One plausible scenario holds that the first life on earth was based on ribonucleic acids (RNA), a simpler chemical cousin of DNA. Many researchers have focused on RNA because it can store genetic information and it can catalyze reactions; these are essential processes in living systems. In this scenario, it is proposed that RNA, a polymer (long-chain molecule), arose from the gradual stringing together of repeating chemical units, known as monomers, that naturally arose on the primitive earth."
plausible - 1 (of an argument, statement, etc.) seeming reasonable or probable. 2 (of a person) persuasive but deceptive. -
Oxford English Reference Dictionary.
scenario - 1 an outline of the plot of a play, film, opera, etc., with details of the scenes, situations, etc. 2 (a) a postulated sequence of future events. (b) any situation or sequence of events. -
Oxford English Reference Dictionary.
So the above paragraph is saying that although scientist are in a 'predicament' (thanks for being refreshingly honest!), they still do not fear 'developing' (some will read here 'making up') what
they see as reasonable or probable. Note too that this is not cast in stone, for it is only one 'plausible scenario'. Sorry Jan, but this paragraph does not tell me that scientists know what the earliest form of life was, only what they think
may have been.
Jan: I don't know when, or even if I will have the time to be able to read let alone fully understand the arguments put forth in "29+ Evidences For Macro-evolution..." I didn't realise it was such a large document, so I think I will have to leave discussion of that particular work to someone else. I will, however, peruse the first few pages, in order to get an idea of what is being presented. Perhaps, as this is 'your' thread and you have made certain assertions, you would like to highlight the main points in order for us to get the gist of the evidence being presented (maybe you already have and I've missed it). I've printed out a copy of "Observed Instances of Speciaton" and will be reading it, as I said, with interest. I will let you know my thoughts when I've fully absorbed all the information (
it ran to 16 pages).
Kind regards.