DNA Analysis proves evolution |
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Tim the plumber
Senior Member Male Joined: 30 September 2014 Location: United Kingdom Status: Offline Points: 944 |
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No you can't define the exact rate of change of a species. But it is reasonable to give it a "somewhere between x and y" value. This is altered by such things as exposure to stress such as starvation or extremes of temperature. If a population is subject to a toxin or aomething then the chance of a birth going to plan is less. The chance of a mutation happening is greater. Also keep in mind that normally evolution has already optimized a species for its niche. If a zebra is born with more slender legs then it might run a little faster but it will probably break one of them. So that is probably a disadvantage. Not so for a race horse. |
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Ron Webb
Senior Member Male atheist Joined: 30 January 2008 Location: Ottawa, Canada Status: Offline Points: 2467 |
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(Sorry for the delay -- I lost track of this discussion somehow.)
Your insistence on "observational evidence" (as you are defining it) is unrealistic and not in keeping with modern science. I don't have observational evidence that my parents ever had sex, either. Nonetheless, the evidence I do have is compelling. I don't need observational evidence, thanks!
You still have this notion that there is some kind of species or creature barrier that needs to be overcome. I think you still don't understand that the species distinctions you are talking exist only for contemporary species. There is no clear line separating species as they evolve. Again, the analogy of the "tree of life" is helpful. If one looks at a horizontal cross-section of a tree, you will find distinct branches and twigs. If you traverse the tree vertically, however, you find continuous limbs from the root to the tips of the branches. There is no species or creature barrier to be crossed. If we can travel an inch, there is no reason in principle why we can't travel a hundred feet.
Yes, and the number of known stars is less than 0.000000000001% (give or take a bunch of zeroes) of the total number of stars. That doesn't stop us from having a good understanding about the process of stellar evolution.
Yes, it's hard to be precise about the time scale. As I said, the transformations along the vertical axis of the tree of life are continuous and gradual. But we can definitely see the transformations. There is no assumption about that.
I guess you missed the sarcasm. Sorry, but I'm not open for a critical analysis of the theory of universal gravitation, and I'm appalled that you apparently are. If you're that anti-science, there may not be much basis for us to discuss anything. For decades the "theory" of gravity has successfully piloted spacecraft to the moon, to Mars and beyond. This is despite the fact that there was absolutely no "observational" (by your definition) evidence, and scant experimental evidence at best, for it at the time. My point is that we don't need direct observation of a phenomemon to have confidence in the theory behind it. If we did, most of modern science (including the science that brought you the machine on which you are reading this) would not be possible.
Nobody ever said that a horse became a zebra or vice versa. How many times do I have to tell you this? |
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Addeenul �Aql � Religion is intellect.
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Quranexplorer
Senior Member Male Joined: 09 May 2014 Status: Offline Points: 152 |
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Parenthood of a child is a matter of faith and trust between the parties involved until the point that trust is broken, beyond which it just falls in to that category of disputes which will have to be settled based on clear proofs. So if your endorsement of the theory of evolution is based on such faith and trust, then I have no problems, as I have made it clear countless times that I completely respect one's choice of his beliefs. Now that you say TE is incapable to establish the kind of evidence that one would normally expect for the kind of claims made under TE, if you wish you may present whatever evidence you have--only in case you have it, don't trouble yourself too much [IMG]smileys/smiley2.gif" align="middle" />
You agree the species distinction exists in contemporary species--so the species barrier is a reality now and you never see this barrier broken in reality. You then say the species barrier is a notion--that sounds a contradictory statement to me. I think the problem is that your arguments start with the premises that TE is a fact, but it is not and unless you break this notion you won't be able to look for objective evidence to prove this theory and that to me is something detrimental to the scientific methods--I think we have got more barriers to break than I initially thought [IMG]smileys/smiley2.gif" align="middle" /> If things were so simple to say that travelling an inch automatically implies that you can travel a hundred feet, then I would suppose that with the same aircraft that goes up in the sky one can simply go to planets like Jupiter or Saturn�but it doesn�t happen so, there are barriers one need to cross to make such things happen and it doesn�t make any sense to blindly believe that such barriers are broken just like that, without any compelling evidence for such happenings.
Are you saying stellar evolution is universally and unanimously accepted as a fact without any evidence or critical analyses, the same way you argue the theory of evolution should be accepted?
But the hypothesis that such transformations bring about species changes is an assumption.
By now I know you can�t even think of thinking something outside these theories�I just chose to ignore your sarcasm. [IMG]smileys/smiley2.gif" align="middle" /> Even though I don�t see the gravitational field, I don�t see any need for me to dispute the theory of gravitation as there is a compelling observational evidence that an apple always falls down to the earth and it always happened and still happens that way whether Newton formulated his theory of universal gravitation or not. I am not anti-science and I would say there is nothing more anti-science than saying that something is not open for critical analysis. In that case Einstein would have been anti-science that he chose to critically analyse Newtonian mechanics and modify it to fit for relativistic regimes. I am only against the idea of using science as an excuse to deny Allah�because that is such a poor excuse! Edited by Quranexplorer - 18 April 2015 at 10:55am |
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Quranexplorer
Senior Member Male Joined: 09 May 2014 Status: Offline Points: 152 |
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I just mentioned it in more straight forward terms that mutation rate is an assumption. Of course you can add adjectives like "reasonable" etc. based on your level of faith in the theory. |
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Quranexplorer
Senior Member Male Joined: 09 May 2014 Status: Offline Points: 152 |
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I didn't know that Quran has defined "G" also. If you don't mind, can you please share the relevant verse so that I can have a look at it? |
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Ron Webb
Senior Member Male atheist Joined: 30 January 2008 Location: Ottawa, Canada Status: Offline Points: 2467 |
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My endorsement of the theory of evolution is based on the same "clear proof" that any court of law would accept to confirm my parentage. DNA establishes both beyond any reasonable doubt.
One would not normally expect direct observational evidence of evolution any more than one would expect direct observational evidence of my parentage.
Contemporary species are distinct, just as you and I are distinct individuals; but that doesn't imply any "barrier". Nobody is suggesting that contemporary species evolve into one another, any more than you or I might evolve into one another. No "barrier" is necessary or even logically meaningful.
There is a very obvious barrier preventing an aircraft flying to other planets -- millions of miles of vacuum. What is the barrier preventing the ancient eohippus gradually evolving through various stages (identified fairly arbitrarily as different "species" but in reality making a smooth transition) into the modern horse?
We have plenty of evidence of stellar evolution. However, no one has continuously observed the entire process of the formation of a star from a giant cloud of gas to a supernova and beyond. Certainly no one has created a star in a laboratory. And the vast, vast majority of stars in the universe (like the vast majority of ancient species) will never be available to us for direct observation. Nonetheless: yes, I would say that the general theory of stellar evolution is universally and unanimously accepted. Nobody insists on direct observation (as you define it).
The theory of gravity, or more precisely the law of universal gravitation, is much much more than just apples falling to the earth. Really, do you think that Newton's reputation is based on such trivial observations? Prior to Newton, it was assumed that gravity was a force that drew objects downward toward the earth. Newton's great insight was to realize that gravitation is a universal force that exists between any two objects. And there was no direct observational evidence for that beyond our own planet until we started flying spacecraft past other celestial bodies. Nonetheless, nobody seriously doubted that gravitation was indeed universal.
I'm always open to a critical analysis of any scientific theory, if you had any evidence to support an alternate theory. But you'll have to do better than rejecting the scientific consensus just because the evidence doesn't meet your totally unrealistic and anti-scientific standard of "direct observation". |
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Addeenul �Aql � Religion is intellect.
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airmano
Senior Member Joined: 31 March 2014 Status: Offline Points: 884 |
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QE
Airmano |
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Tim the plumber
Senior Member Male Joined: 30 September 2014 Location: United Kingdom Status: Offline Points: 944 |
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It is a reasonable aproximation that the length of the day on Earth is 24 hours. Each day is slightly different, taking a day as noon to noon. The rotation of the Earth is not 100% stable. It is reasonable to expect that the rainfall in Sheffield, where I am, is going to be higher than the rainfall in Mecca this year. There may have been years where this was not true. But it's a fair bet. The rate of mutation is not fixed to the same degree as the rotation of the Earth but the rate is knowable to a higher degree than the variability of weather in Sheffield. Despite this I can confidently predict the overall climate for Sheffield within a reasonable range. There will be exceptions. The world is complex. Unlucky, deal with it. |
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