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Scientific Evidence for Universal Common Descent

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usfan

Well-Known Member
Your projection is so precious and is almost as impressive as your unwarranted hubris.
You sure are stubborn. I won't reply to any alleged scientific arguments, if they are shrouded with snarky, demeaning, personal attacks. You can keep them up, (and your devotion is awesome!), but i won't engage you in rational debate. I'll dismiss you as a heckler, since it is what you want..
 

tas8831

Well-Known Member
No, it is your constant tactic as a heckler, that makes me skip over most of your posts, as you well know.
And you do what, now?
If you truly wanted to debate the science, you would post rational, civil posts, with points and evidence.
I did that here:

Scientific Evidence for Universal Common Descent

It was my first post in this thread. I provided a preamble:

OK. Here is my case, along with the evidence (hate to be the broken record):

-----------------------------------------------------------------------------------------------------------------------------------------------------
I forget now who originally posted these on this forum, but I keep it in my archives because it offers a nice 'linear' progression of testing a methodology and then applying it - I have posted this more than a dozen times for creationists who claim that there is no evidence for evolution:​

followed by 6 partial abstracts or quotes from 6 cited papers, and ended with my "point":

CONCLUSION:

This evidence lays out the results of employing a tested methodology on the question of Primate evolution. The same general criteria/methods have been used on nearly all facets of the evolution of living things. Other than bland, predictable, and rather lame attempts to undermine the evidence by citing 'worst-case scenario experiments' and the like, no creationist has ever mounted a relelevant, much less scientific rebuttal. And, of course, no creationsit has ever offered real evidence in support of a biblical-style creation.​

I even left in my typos for transparency.

Your response?

Scientific Evidence for Universal Common Descent

I'm not going to sift through all that to try to discover a 'point'. This is obfuscation with volume. Long cut & pastes, with no specific point being made does not equal 'evidence!' Perhaps it applied, in whatever setting you wrote it for, but this is not that setting. Bible verses are irrelevant in this discussion.​

YOU set the tone.

And now, you blame everyone else.
But, since you primarily promote propaganda and heckling, i conclude you do not want to debate the science, but prefer propaganda.

1. Request a reset (if you are a typical heckler)
2. Make a single point/argument
3. Support it with a link, study, or quote, if you wish
4. Ditch the snark and ad hom

If not, continue your ridicule and fallacies, and I'll continue to ignore any points you have buried in them.

What "markers" are you referring to in the Canid paper?

How are papers using the entire mtGenome NOT also, by default, using all of the markers used in your Canid paper, to include the other more recent Canid paper that I referred to?

Would not the use of the entire mtGenome by definition also be using any and all mtGenomic 'markers'?

And this is a very serious question - Do you really think that, for example, the Primate tree I posted was made first, without using evidence or data analyses, as you seem to have implied, but that the tree in your Canid paper alone used mtDNA 'markers' to 'trace the ancestry'?
 

Subduction Zone

Veteran Member
No, it is your constant tactic as a heckler, that makes me skip over most of your posts, as you well know.

If you truly wanted to debate the science, you would post rational, civil posts, with points and evidence. But, since you primarily promote propaganda and heckling, i conclude you do not want to debate the science, but prefer propaganda.

1. Request a reset (if you are a typical heckler)
2. Make a single point/argument
3. Support it with a link, study, or quote, if you wish
4. Ditch the snark and ad hom

If not, continue your ridicule and fallacies, and I'll continue to ignore any points you have buried in them.
No one will take you seriously when you make false clams about others. And once again, no one has used ad hom against you. You really should learn what an ad hominem fallacy is. It goes much deeper than an extremely shallow look at the etymology of the phrase.
 

Subduction Zone

Veteran Member
:rolleyes:

..yes, asking for evidence for a scientific theory is soooo.. dishonest..

:facepalm:

You think false accusations provide evidence for common descent? :shrug:
It is dishonest when you do not understand the concept.

Either you are a liar or you do not understand the concept of scientific evidence. Why are you so afraid to learn?

Once again your logic skills need a tune-up.
 

tas8831

Well-Known Member
You sure are stubborn. I won't reply to any alleged scientific arguments, if they are shrouded with snarky, demeaning, personal attacks. You can keep them up, (and your devotion is awesome!), but i won't engage you in rational debate. I'll dismiss you as a heckler, since it is what you want..
99% of your posts are littered with insults and accusations and condescension.
You even admit that you toss in snark. Why the double standards?

It is OK if you try to rationalize your avoidance behavior and dodging - readers see what is going on.



What are the "markers" in your Canid paper that analyses using the ENTIRE mtGenome do not use, according to you?
 

tas8831

Well-Known Member
Heckling in RED.
I used scadding's ARGUMENTS.. not his authority. Unlike the irrational progressive indoctrinees here..
F*** scadding. I don't care what he believes. But his arguments on vestigiality are sound. Address them, if you want to refute the argument, instead of trying to discredit the source..

Bluff. You poo flinging hecklers won't touch scientific evidence with a 10 foot pole... oh, you may hide some vague innundo or allusion of something that 'sounds sciency!', in your floods of heckling and hateful personal attacks, but your evidence is pretty pathetic.. non existent, really
:shrug:

Hardly. I fling a little poo back at you every so often, but mostly just i expose you as unscientific propagandists and religious fanatics, defending your beliefs with jihadist zeal..

Well, golly gee. That's what I've been saying. They only vary, within the limits of their dna. Macro evolution is an unevidenced belief, and has NEVER been observed.

Projection. Just because you impotent 'debaters' don't know the facts, have no reasoning ability, and run on emotion and hysteria, does not indicate I'm lying. That is a false accusation and is exactly ad hominem.

Who cares?:shrug: so are you going to produce EVIDENCE for your belief that 'Vestigiality!' somehow proves common descent? Or just assert it dogmatically?

:facepalm:
Right. Project distort, and falsely accuse all you want. I have no illusions about the intellectual depth of the True Believers, here..

That's your schtick. I look at the evidence, and let people decide for themselves. You and your fanatical cronies are obsessed with 'winning!' or some other groupthink loyalty game. I deal in the facts of science and reason.. not something progressive indoctrinees are good with. You've got your memorized dogma, and facts, reason, and reality will not affect them.

/Yawn/..
Let me know if you get tired of flinging poo with your heckling, shrieking troup.. did you bring peanuts? ;)

Your obsession with credentials is pathetic. I make arguments and deal in facts. You have ridicule, mocking, and fallacies. So how does that evidence your beliefs? Deflect with arguments of authority all you want.. you merely out yourself as a propagandist.

The irrational, unevidenced, unscientific hysteria from these pseudo science religious fanatics always amazes me
.. :rolleyes:

Typical double standards from alt-right fascist creationist slogan-spewing wannabe pretenders.
 

tas8831

Well-Known Member
I used scadding's ARGUMENTS.. not his authority. ...
F*** scadding. I don't care what he believes. But his arguments on vestigiality are sound. Address them, if you want to refute the argument, instead of trying to discredit the source..

Ah, so you agree with Scadding that vestigials are actually good evidence for evolution, but as homologous structures, since determining vestigiality is subjective:

"Vestigial organs represent simply a special case of homologous organs, i.e. structures similar infundamental structure, position, and embryonic development, but not necessarily in function.... While homologies between animal specles suggest a common origin, the argument, given above asserts that vestigial organs provide special additional evidence for evolution. Our knowledge of anatomy, necessary to identify homologies, is based on straightforward observation of adult or embryonic structure. However, when one begins to investigate the function of these structures necessary to identify vestigiality, the situation is not so clear. In many cases the functions of minor structures are not well understood. Identification of function is often based on experimental procedures, the results of which require some interpretation." ~zoologist S. R. Scadding. 1981​

and later:

Naylor states that ... "[vestigial organs] would still provide powerful evidence for the theory of evolution." I agree with this, but I suggest that this evidence is due to the homologies these organs illustrate and not to their vestigiality. ~zoologist S. R. Scadding. 1982​

Glad you agree with Scadding that vestigials/homologies are good evidence for evolution.
 

tas8831

Well-Known Member
I didn’t find any links in that list to any speciation model that is widely used, or that has been used for any practical purpose.
So you are not a serious discussant.

"I’m not sure if you got my point, that according to that Pew survey, a weighted percentage of at least 6%, and possibly 99%, of the sample of working Ph.D. biomedical scientists agreed that God did it."


Yup... not serious...
Got it.
 
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tas8831

Well-Known Member
@usfan,

What "markers" are you referring to in the Canid paper?

How are papers using the entire mtGenome NOT also, by default, using all of the markers used in your Canid paper, to include the other more recent Canid paper that I referred to?

Would not the use of the entire mtGenome by definition also be using any and all mtGenomic 'markers'?

And this is a very serious question - Do you really think that, for example, the Primate tree I posted was made first, via beliefs or desires, without using evidence or data analyses, as you seem to have implied, but that the tree in your Canid paper alone used mtDNA 'markers' to 'trace the ancestry'?

Thanks!
 

tas8831

Well-Known Member
Came across this paper using complete mitochondrial genomes and all of the markers contained therein to assess Primate evolution.

A Mitogenomic Phylogeny of Living Primates
July 16, 2013

From the results and discussion:

We produced complete mt genome sequences from 32 primate individuals. From each individual, we obtained an average of 1508 tagged reads with an average length of 235 bp, yielding approximately 356 kb of sequence data corresponding to 21-fold coverage. All newly sequenced mt genomes had lengths typical for primates (16,280–16,936 bp; Table S1), but the GC-content varied largely among taxa (37.78–46.32%, Table S2, Figure S1). All newly generated mt genomes consisted of 22 tRNA genes, 2 rRNA genes, 13 protein-coding genes and the control region in the order typical for mammals. By combining the 32 newly generated data with 51 additional primate mt genomes, the dataset represents all 16 primate families, 57 of the 78 recognized genera and 78 of the 480 currently recognized species [31].​


They used 81 complete mitochondrial genomes from primates representing all 16 families. The descriptions of the genomic content represent all of the markers that one could hope for. "The mtDNA provides clear evidence of the descendancy..." The use of these markers allow for the tracing of the ancestry of all of the primate taxa used, as shown in this genetically evidenced descendency chart, and "You can see from the following chart, where they mapped the genome sequence, & followed the trail of the mtDNA":


View attachment 31631

Note that this includes humans, Neanderthals, etc. "And btw, this phylogenetic tree has evidence to support it. The genetic lines can be traced, not just presumed."

The type of data used and the means of analysis employed have been pre-approved by creationist genetics experts, so there is no denying the shared ancestry of human, chimps and other primates are demonstrated in this genetically evidenced descendency chart.
 

tas8831

Well-Known Member
I find it very curious, that the indignant debaters and True Believers for common descent don't even seem to know the main arguments for their own theory.. :shrug:

How about this one?

Vestigiality

Vestigial organs: These are organs or conditions that do not seem to have a current function, and are explained as a 'leftover' from a previous incarnation.

There are a lot of assumptions, calling something 'vestigial!' It is based mostly on a 'looks like!' fallacy of plausibility, not anything evidentiary or experimental.

It was a popular 'proof!' in the 19th century, when they didn't know what some organs were for...

"The 'vestigial organ' argument uses as a premise the assertion that the organ in question has no function. There is no way however, in which this negative assertion can be arrived at scientifically. That is, one can not prove that something does not exist (in this case a certain function), since of course if it does not exist one cannot observe it, and therefore one can say nothing about it scientifically. The best we can do is to state that despite diligent effort, no function was discovered for a given organ. However it may be that some future investigator will the discover the function. Consequently, the vestigial organ argument has as a premise, either a statement of ignorance (I couldn't identify the function), or a scientifically invalid claim (it does not have a function). Such an argument, from ignorance, or from negative results, is not valid scientifically, and has no place in observational or experimental science.

"Since it is not possible to unambiguously identify useless structures, and since the structure of the argument used is not scientifically valid, I conclude that ‘vestigial organs’ provide no special evidence for the theory of evolution."
~zoologist S. R. Scadding (University of Guelph, 175f.)

"Vestigial organs represent simply a special case of homologous organs, i.e. structures similar infundamental structure, position, and embryonic development, but not necessarily in function.... While homologies between animal specles suggest a common origin, the argument, given above asserts that vestigial organs provide special additional evidence for evolution. Our knowledge of anatomy, necessary to identify homologies, is based on straightforward observation of adult or embryonic structure. However, when one begins to investigate the function of these structures necessary to identify vestigiality, the situation is not so clear. In many cases the functions of minor structures are not well understood. Identification of function is often based on experimental procedures, the results of which require some interpretation." ~zoologist S. R. Scadding. 1981

Naylor states that ... "[vestigial organs] would still provide powerful evidence for the theory of evolution." I agree with this, but I suggest that this evidence is due to the homologies these organs illustrate and not to their vestigiality. ~zoologist S. R. Scadding. 1982​

An interesting fun thing is to google usfan's version of the quote verbatim as presented.
 

Jose Fly

Fisker of men
Exactly.
One has to wonder about the psychology of such folk - do they REALLY think that they, and they alone - layfolk with no actual science background - have discovered evolution's Achilles' heel?
And when even simple definitions of terms are beyond their ability to grasp, that they have superior scientific knowledge?
The hubris, the pride, the lack of self-awareness, the unwarranted condescension premised on their documentable ignorance.... It is SO common in creationists so as to almost define them as a group.
Apparently so. Apparently @usfan does really believe that despite his self-admitted lack of expertise in evolutionary biology, he is fully capable of reviewing, critiquing, and passing wholesale judgement on the work of evolutionary biologists. Oh, and he apparently also believes that everyone else should not only listen to him on the subject, but go along with everything he says about it.

It's really weird to watch.
 

Jose Fly

Fisker of men
False. The polls that I’ve seen did not show how many scientists agree that humans and other species have a common ancestor. That question was not asked.
It is implied in the questions. The Pew survey gave scientists the following choices to pick from...

Humans and other things have:
Evolved over time (either through natural process or guided by a supreme being), or
Existed in their present form since the beginning of time.

As a biologist, if I were given that survey I would instantly recognize what they're asking. They're effectively asking me whether I think that all life (humans included) are the product of evolutionary processes (either all on their own, or guided by a god) or were specially created.

Further, given that the only scientific model for human evolution is human/primate common ancestry, it's understood that "humans evolved over time" refers to human/primate common ancestry. Likewise, it's the same for "existed in their present form since the beginning of time", and how that obviously refers to creationism's belief in special creation of humans.

False. None of the statements that I was linked to said anything about common ancestry.
You were given THIS LINK to a special issue of the journal Science, wherein human/common ancestry is a primary topic.

False. It might be true that a vast majority of the world's scientists agree that common descent is real (humans included), but that conclusion can not be reasonably drawn from the polls, or from the statements of professional associations.
You are incorrect.
 

Jose Fly

Fisker of men
The surveys did not sample the views of the world’s scientists. 9,998 of the members of an American professional association were invited to respond to a questionnaire, in a context of furious debating about what should be taught in public schools.
It's called statistical sampling.

The statements from professional associations are all from American Associations
Because it is a non-issue in other countries.

and they are all political statements opposing the teaching of creationism in public schools, not statements about common ancestors.
Earlier in this post you were talking about surveys, now you're talking about official statements. As noted earlier, not only did the AAAS issue a statement, they published a special issue of the journal Science in which common ancestry (humans/primates) was a specific topic.
 

Jose Fly

Fisker of men
@usfan It looks to me like evolution theory does not include any useful or widely used model of how new species have evolved.
Here, educate yourself....

Peripatric speciation - Wikipedia

Allopatric speciation - Wikipedia

Anagenesis - Wikipedia

Sympatric speciation - Wikipedia

Sympatric speciation in palms on an oceanic island

Sympatric speciation in Nicaraguan crater lake cichlid fish

The theories are models, and that has nothing to do with evidence.
Um.....theories explain the evidence.
 

Bear Wild

Well-Known Member
You sure are stubborn. I won't reply to any alleged scientific arguments, if they are shrouded with snarky, demeaning, personal attacks. You can keep them up, (and your devotion is awesome!), but i won't engage you in rational debate. I'll dismiss you as a heckler, since it is what you want..
You have been given so much scientific evidence which you then either ignore or discredit with your opinion (not evidence). You deny any evidence that contributes to the whole argument that there is common descent which is the way science builds the supportive evidence. So why not just try once to give an actual scientific study which shows evidence against common descent. I cant wait to read it.
 

tas8831

Well-Known Member
Apparently so. Apparently @usfan does really believe that despite his self-admitted lack of expertise in evolutionary biology, he is fully capable of reviewing, critiquing, and passing wholesale judgement on the work of evolutionary biologists
Even as he dismisses actual scientific research because of all the "technobabble"....
Oh, and he apparently also believes that everyone else should not only listen to him on the subject, but go along with everything he says about it.

It's really weird to watch.
It is.
 

tas8831

Well-Known Member
The theories are models, and that has nothing to do with evidence.
I do often wonder why it is that people with no understanding of the subject whatsoever nevertheless will feel compelled to pontificate on the matters at hand.

Here you go, fella - Theory in Science:

Part of the problem is that the word "theory" means something very different in lay language than it does in science: A scientific theory is an explanation of some aspect of the natural world that has been substantiated through repeated experiments or testing.

Or maybe:

  • Theory: In science, a well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses.
Unlike some others, you still sort of have a chance to save face - before making additional assertions and demands, please at least try to educate yourself. Or just ask, rather than declare erroneously. Continuing down this path of using words incorrectly while implying to know all about it will only place you among the ranks of the thread starter.
 
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