Ojian
Member
- Joined
- Jan 14, 2008
- Messages
- 74
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- INTP
Apologies for the long response.Yes, I am asking you to prove negative.I know it is an absurd request, but you claimed:
".the evidence shows that the 'stuff' it can do is limited."
Absence of evidence is not an evidence of absence (assuming that the evidence is absent, which is incorrect).
More importantly, you seem to confuse evidence with physical observation. The two are related, but not the same.
As I said before, the evidence of what M+NS can do it out there. I gave a few of the popular examples. Everything that has been observed or demonstrated is limited to microevolutionary levels (Microevolution = minor changes within existing species). When I say that it is "limited", that is just my word (perhaps not the best word) to point to what the data shows. Macroevolutionary changes have not been demonstrated with M+NS. And no, I am not referring to just physical observations. But I wonder then what it is you are defining as evidence?
Absence of evidence may not be evidence of absence (I agree), but you certainly cannot claim something as truth or settled without evidence. Without evidence, it will not stand. And that is the scenario I am claiming unguided macroevolution is in - it is bereft of evidential support.
Then what are they??? Whether or not I reject them will depend on the evidence itself. But I wonder, for something that is supposed to be such a rock solid idea, why is the evidence only "marginal". I would suspect that it would be quite clear and in abundance.There are few examples of direct observation of macroevolution, but they do exist. I suspect that you will reject them, because they are marginal.
No, it doesn't have to be so dramatic, but of course something like that would work well. I don't suppose you have that evidence, do you?But let me ask you this: what kind of macroevolution would convince you? Does it have to be something spectacular, like a transition of a hippopotamus into a dolphin?
I'm defining macroevolution as a process using M+NS to be the origin of new species, organs, and body plans. It also could be referred to as the Modern/New Synthesis, Neo-Darwinism.
Contrary to your other claim, vast majority of research biologists and related scientists consider evidence for macroevolution overwhelming. This is demonstrably true if you do search for peer reviewed papers on evolution in scientific databases. This is not a proof that macroevolution is true of course, but it will show that your claim:
"many scientists are very aware of the capabilities of NS and are instead looking for an alternative explanation."
is unsupported. Unless of course your definition of "many" is few.
Also, what is this alternative scientific explanation that they are looking for?
Again, I ask: What evidence? Just give me one good example, your best.
As far as telling me to go search google, that is just a huge citation bluff. You need to do a little better, and it is not my job to do yours for you.
As for scientists doubting Neo-Darwinian methods, making some statement as to how many of one side or another is a weak argument. Science is not determined by consensus.
But for examples of a group of leading scientists that are doubting things :
Home | The Third Way of Evolution
And the recent Royal Society meeting, one report - The Biologists Who Want to Overhaul Evolution - The Atlantic
Hippos and whales are hardly close. How are they related? Are you referring to the often stated land mammal to whale evolution that is often described as this LINK?Going back to hippopotamuses and dolphins. They are actually quite closely related. No one will be able to demonstrate to you that transition (or rather transition from the common ancestor) but there is plenty of evidence for that relationship. There is at least half a dozen transitional forms in the fossil record and related palaeogeographical, paleoenvironmental and geochemical evidence. These are not so-so stories.
Before addressing that, I must point out that you seem to have lost your eye on the ball. We've been focusing on (supposed) M+NS changes in the DNA that can create new organs, functions information, species, etc. None of the (again supposed) transitional fossil examples speak to DNA, but instead based on homology and/or morphological traits where evolution is assumed to be the process. But in order for a hippo or a similar ancestor to change into a whale via M+NS methods requires a whole host of new organs and body features to arise from random mutations (even assuming it is possible) in an impossibly short time period (relative to popuation genetics). Frankly, you need to tell a "whale" of a tale (LOL, get it?!?) to get there.
But as for the fossils, they discovered a fossilized whale similar to Basilosauras that was dated to within a million years of the oldest supposed land mammal relative. That would leave no feasible time to accomplish whale 'evolution'.
Tell me, why do dolphins and whales share more DNA with hippopotamuses or cows than cows with horses? Why do whales have muscles for moving ears if they don't have external ears that can be moved? why do they have vestigial olfactory nerves? Can they smell underwater? Why do their foetuses have hair or vestigial limbs?
At least now you reference DNA. Too bad though as that argument means nothing. Share how? Humans supposedly share 50% of their DNA with a banana. But I'm not hearing anyone claim we came from a banana ancestor. The issue is not that we may have similar DNA - that can be explained by a creation/intelligent design just as well (if not better) as M+NS explanation. The issue is how is the information expressed by the DNA come about and used for whatever particular purpose. M+NS is impotent to explain that. And when you get even beyond DNA to epigenetics, sugar code, spacial arrangement of cellular components (leaving off body plan arrangements), HGT, gene splicing and editing.... none of that is addressed by M+NS.
I've not heard about the whale ear muscles issue, unless you are referring to the ear bones in Pakicetus (which today is a non-issue and whose link on that basis has been pretty much falsified). Do you have a reference?
Vestigial olfactory nerves? Again, what specifically are you referring to? Is this linked to supposed psuedogenes involving the OR olfactory genes? If so, that has been basically busted as well. The gene has benefits other than olfactory purposes, which would make it not a psuedogene and pretty much negates it as being vestigial.
I haven't heard of the "hair" issue and am not sure why that would be an issue. As for vestigial limbs? Again, this is no longer an issue as they have found for whales a function for the (supposed) 'hind limb' bones that involve reproduction. So again, calling them vestigial is a bit of a misnomer.
Pretty much did for most. I can link references if you really need them.Can you explain the purpose of all these features?
Oh, but I do. See above.Or maybe you don't believe in any purpose of such things?
No I dont. Actually, that is the position that evolution takes.Maybe you think that animals are just lumps of random organs thrown together, whether they fit or not?
They are not 'my' biologists. Nevertheless, the reason they are looking for an alternate explanation is because they realize that M+NS cannot do the job. Please understand that most of these scientists are not supporting ID or any creation or creationist model. They are looking for a materialistic explanation, but they do not have any faith in M+NS for it.Maybe the alternative theory of your many biologists can explain that?
If you mean evolution as M+NS,. then no, they cannot be explained. That is what I have been trying to say. It has not been demonstrated and it has not been even hypothetically shown how it could happen. Beyond an assumption that evolution is true and a bunch of hand-waving general stories: "We think X evolved into Y", there is nothing there.Please, share these explanations. Because all these things can be explained by evolution. And all you have been saying so far is that it has not been demonstrated.
*sigh* Are you referring to vitellogenin pseudogene story? Please! If this is the level of support that is going to be laid out, I have nothing to worry about.Also, can you or your alternative theory explain why humans posses mutated, non-functional genes for production of egg yolk in exactly the same genome location as chickens? Is this a sign that in our "plasticity" we may start laying eggs at some point?
For those needing the story, there are six genes that were studied that are supposedly shared by humans and chickens. For chickens, these genes are involved the production of egg yolk. The idea is that since humans do not produce egg yolk, then in humans these genes are pseudogenes (genes with relatively the same arrangement that are not active or not used for coding proteins) derived from common descent with chickens.
Of those 6 genes, 3 of them (ELTD1, SSX2IP, CTBS) are functional in both chickens and humans, so there is no evidence of them being pseudogenes. Of the remaining 3 (VIT1, VIT2, VIT3 - referred to as vitellogenin), 2 of those (VIT2, VIT3) have almost no showing in humans and arguably are not even there.
So the whole argument comes down to the vitellogenin psuedogene VIT1. Of the almost 43,000 base pairs in this gene, there are two stretches of about 150 base pairs that line up relatively well between chickens and humans. This gene in chickens is functional and produces egg-yolk. There is no indication that in humans it is used to make protein. The argument rests on the assumption that the human version of the gene comes via common descent, and the genes only function is to produce egg yolk but it lost its protein producing capabilities (for humans) along the way.
The problem with the argument is 1) the amount of sequence similarity is very low, 2) the gene is transcribed into long non-coding RNA which may have regulatory functions - which means that the sequence similarity could be due to function and doesn't have to indicate common ancestry or the prescence of an egg-laying protein.
So your claim and question are a bit overstated.
Agreed! But the problem I have is that #2 does not produce new species, forms, or body plans.1) we have witnessed NS operating for as long as we know, and
2) there are no known factors that would prevent NS from continuing its operation on a larger scale in longer timeframes.
Per your number example, I'm not disputing that NS works like 1+1+1+... What I am saying is that result "5" is not an example of a new form. It's more like going via 1+1+1... you need to get to result 997 and only prime numbers along the way are viable steps. Each time you hit a non-prime number you run a high probability of the whole process failing.