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Author Topic:   The Definition for the Theory of Evolution
Modulous
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Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 3 of 216 (409133)
07-07-2007 3:31 PM
Reply to: Message 1 by RAZD
07-07-2007 11:18 AM


my opinion, my Favorite
which is the better definition from a the standpoint of the science of evolution,
Definition 1
what are the failings of each definition, and
The first is a general overview of evolution, and the latter is a specific overview (ie, natural history). Neither is a definition of the theory of evolution.
what is your personally preferred (concise) definition.
The theory of evolution is a collection of mechanisms that describe how hereditary change in species over time happens.

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 Message 1 by RAZD, posted 07-07-2007 11:18 AM RAZD has replied

Replies to this message:
 Message 5 by subbie, posted 07-07-2007 3:51 PM Modulous has replied
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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 6 of 216 (409139)
07-07-2007 4:22 PM
Reply to: Message 5 by subbie
07-07-2007 3:51 PM


Re: my opinion, my Favorite
Populations change over time, mostly due to selective pressures to which the populations are subject, which enable those offspring better adapted to the environment to reproduce at a higher rate than those which are not. This change occurs because those organisms that are better adapted tend to pass on more of their genetic make up to the next generation.
Now that is a description of the theory, perhaps even an overview of the theory. You start your definition with a fact, and then go on to describe one factor which can cause the fact. I don't think it is possible to 'define' a theory. However it is possible to define the term 'The Theory of Evolution'. A definition should really be able to be tacked on to the prefix 'The theory of evolution is...'.
As to the question, 'what are these mechanisms that the theory describes?' we might turn to something like your description. We know that there are several mechanisms, selection being the one you focussed on and of course there is hereditary variation, neutral drift and epigenetics etc.
My concise statement tells you what the theory of evolution is, not what the mechanisms are, not how they operate or how they cause change...just a definition of The theory of Evolution
Edited by Modulous, : No reason given.

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 11 of 216 (409161)
07-07-2007 6:14 PM
Reply to: Message 7 by subbie
07-07-2007 4:43 PM


Re: my opinion, my Favorite
Well, let's see if we can't hone in on the guts of the topic without getting bogged down in semantics.
Hehehe, a discussion on definitions getting bogged down by the meaning of words?
It seems to me that any definition or description of the ToE should be comprehensive enough to rule out alternative theories about how descent with modification may occur. In addition, it should not include things that are not part of the theory that someone might try to graft onto it in an effort to undermine it.
Yes - if we were going to describe the theory of evolution that is currently accepted by a consensus of those that study it - but such a thing is difficult to do concisely. If we are to give it a name it would probably be 'The Synthetic Theory of Evolution'. It is a synthesis of a number of theories, such as Darwinism and Mendelian genetics as well as more modern theories stemming from our understanding of genetics. I suppose you could define the synthetic theory like this site does:
quote:
Synthesis of Mendelian genetics and Darwinian selection into a modern theory of evolutionary change.
Or this one:
quote:
[The Synthetic Theory is] essentially a combination of Charles Darwin's concept of natural selection, Gregor Mendel's basic understanding of genetic inheritance, along with evolutionary theories developed since the early 20th century by population geneticists and more recently by molecular biologists
Trying to include all of the mechanisms into the definition will fall foul of the original parameter by being necessarily verbose. Probably the size of a book or more likely several hundred books - just see how wordy Gould got in his 'The Structure of Evolutionary Theory'

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 12 of 216 (409163)
07-07-2007 6:22 PM
Reply to: Message 8 by RAZD
07-07-2007 4:54 PM


Re: my opinion, my Favorite
In other words you want a set of mechanisms to say how evolution occurs referenced in the definition.
Quite the contrary, I don't think it is possible, not without losing the concise edge. If I am going to describe the theory of evolution I would say it includes natural selection, hereditary variation, neutral drift and epigenetics to name a few but I would be more keen to draw a line between the phenomenon and the theory that explains the phenomenon.
What is the theory of evolution? It is the theory that explains the phenomenon of evolution. It is a body of knowledge of hypotheses and theories that, when combined help explain all the ways we know how population changes can occur under certain circumstances. Those circumstances are present in life and so the theory can help explain the evolution of biological life. Some examples of these sub-theories include the process of natural selection acting on hereditary variations, neutral genetic drift, recombination of recessive and dominant traits and so on and so forth.

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 Message 8 by RAZD, posted 07-07-2007 4:54 PM RAZD has replied

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 13 of 216 (409164)
07-07-2007 6:24 PM
Reply to: Message 10 by subbie
07-07-2007 5:27 PM


Re: my opinion, my Favorite
I think that's incomplete without including that some changes confer survival advantages on some organisms because of environmental pressures and that those organisms better adapted tend to prosper at the expense of those less well-adapted.
Realising that this might be going down the route of pedantic semantics, but you've just described in more detail one item on RAZD's list: natural selection.

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 27 of 216 (409273)
07-08-2007 12:03 PM
Reply to: Message 22 by anastasia
07-08-2007 3:03 AM


Re: Your opinion, Your Favorite
I am not suggesting that anyone TRY to cause insomnia...but decent with modification is not the thing that creationists contest. That is easily observable. To ensure no oversight, it must be clear that macro evolution happens.
The first big hurdle is to try and convince creationists that they don't have a problem with the theory of evolution. We shouldn't word it so that they do have a problem with it just to fit their misconceptions. Creationists agree that (at least most of) the mechanisms proposed in the ToE can lead to genetic changes in a population.
The disagreement is twofold: How much change the theory of evolution can explain (it can explain micro but not macro according to the creationists) and how much change has occurred on earth (only micro and not macro).
Either way, there is little true quarrel from creationists about the theory - most think that common ancestry is the theory of evolution and we should take pains to steer them from that misconception. It is only when we agree on consistent terms that we can have a meaningful debate.

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 33 of 216 (409291)
07-08-2007 1:14 PM
Reply to: Message 28 by Grizz
07-08-2007 12:35 PM


Re: Your opinion, Your Favorite
Looking at the literature available there does not seem to be a standard defintion for what evolution is. There are too many terms a lay reader comes accross - Darwinism, neo-dariniwms, mutations, natural selection, gene drift ect ect. The result is information overload.
No, but there is a consistent description of it that does not need to refer to Darwinism. If you wish to discuss the theory of evolution you would have to talk about a synthesis of various biological theories. If you want to know what those theories are you can start naming them. Darwinism, Mendelian genetics, gene drift. I can tailor the description quite easily depending on how much information you want.
You could spend hundreds of books describing all the parts of the Theory of Evolution, as I said earlier, and this is hardly a failing.
A student looking at a physics text might see a defintion of gravity such as 'the force of attraction between 2 bodies'. One can very easily conceptualise this. Reading and following a theory of origins like the Big Bang also is easy to conceptualise.
And you then go on to say that Biology is harder to describe than physics!!! Sure, its easy to say 'the Universe exploded from nothing and gravity is a force of attraction'. I can do that for biology just as easily. Then, as with biology we then hear talk about further complications such as the expansion of time and space, how gravity is warping of the fabric of space and time caused by masses, masses being energy.
And soon enough - your head will explode. It can easily (and is often) discarded as mumbo jumbo.
You seem to think that the scientific community does a good job on getting the theory of relativity across to the public, despite the fact that almost everybody doesn't even have the first clue about it. Most people don't even realize that gravity, relativity and the big bang are part and parcel of relativity!
The end result is that some people don't know these things because they don't care to. Others don't listen to these things because they choose to believe strawmen so they don't have to accept the disturbing conclusions.
In the end, it is not the scientific community that has to present the theory to the public - there job is doing science not teaching it (though given the academia side of it, some scientists do both or even just teach it). The information is out there for anybody who actually wants the information - it took me about 12 months to get decently acquainted with the theory with only a casual amount of time exploring it. I found the sources engaging and interesting but most people just don't care.

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 Message 28 by Grizz, posted 07-08-2007 12:35 PM Grizz has replied

Replies to this message:
 Message 35 by Grizz, posted 07-08-2007 1:25 PM Modulous has replied
 Message 38 by Grizz, posted 07-08-2007 1:38 PM Modulous has replied

Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 34 of 216 (409292)
07-08-2007 1:22 PM
Reply to: Message 32 by Grizz
07-08-2007 1:04 PM


As I said I am eager to hear what the theory of evolution predicts about the specific mutations that will occur within a genome. Just give me a probability instead of a specifric inference. That would be good enough.
Well that does get done - but that isn't what the theory of evolution deals in since it deals with changes to populations not changes within individual genomes. Sure - there is some cross over and genetics has an understanding of mutation 'hot spots' where the probability of an uncorrected copying error will occur.

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 37 of 216 (409296)
07-08-2007 1:36 PM
Reply to: Message 35 by Grizz
07-08-2007 1:25 PM


Re: Your opinion, Your Favorite
As I indicated in my prior post Physicsts teach physics to the public all the time via popularised accounts of current theory. These accounts are not loaded down with jargon but are capable of taking extremely complex mathematical theories and making them intelligible to the lay public.
Right - like how the biological community talks about peppered moths without 'jargon' and then talk about dinosaurs and birds and mammals and all of natural history without resorting to jargon.
However - you ask the random person what relativity is and he might say 'nothing can travel faster than light' or 'e=mc2' and that's about it. Ask them about evolution and they'll talk about dinosaurs and birds, they might throw in natural selection and/or 'survival of the fittest'. The public don't really care, and get their information from popular culture, not scientists.
The more complex the subject, the more distorted it has to get to be understood by a passively observing Joe Public.
There is also a larger issue here. The majority of students who will take a high school biology class are not really interested in science or the issues we are discussing. To them Science is for Geeks. Science(biology especially)is not very popular among youth.
The Biological sciences are in desperate need of a Carl Sagan type figure to popularise the field.
Biologists always have had physics envy.
I'm more of a physicist than biologist, and I have to call baloney on this: it is one of those snobbish things physicists say. It's like how physicists get consulted in sci-fi productions, but biologists rarely do. Biology is specific subset of physics - dealing with a complex subject matter. However, biology has had its Carl Sagan - Stephen J Gould. Would it be great to have other charismatic leaders explaining the science to people? Yes, always! I don't see them in desperate 'need' of it though. And we still have PZ Myers and Dawkins, who are at least excellent writers.

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 39 of 216 (409301)
07-08-2007 1:56 PM
Reply to: Message 38 by Grizz
07-08-2007 1:38 PM


physics is just as boring as biology
Quite honestly most people would rather stick pins in their eyes than read an account of genetic drift or mutations within a genome.
And most people would rather stick pins in their eyes that hear about the difference of the fundamental particles or learn about the unification of the strong nuclear force.
On the other hand...mutants? Mutations? Cool. (nearly) Everybody understands that genetic mutations can have big effects on our bodies and if that effect is good, then that mutation might become the 'norm'. Like giraffes with long necks or dinosaurs into birds.
If you want to pick and choose the scales to make it look like physics has got its act together and is awesomely cool and biologists are perceived as mumbo jumbo talking boors go for it - but I reject it. Sure - physics leads to technology so it holds people interest longer (warp engines! Teleportation! Laser guns!), but biology gets a look in where it can.

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 41 of 216 (409303)
07-08-2007 2:13 PM
Reply to: Message 40 by Grizz
07-08-2007 1:57 PM


Getting biology to the masses
Physicists have a right to be snobby - They have succeeded very well in making their field intelligible to the lay public who will never open a physics textbook. They have turned complex and information rich mathematical theories into fascinating expositions the public eats up.
Right - they have watered down the salient points and have captured the imagination of the public who then go onto misunderstand the theories to tragic levels.
And so have the biologists. Evolution has massively taken hold in the public's imagination and you'd be deluded to think otherwise. As with the big bang, gravity, or the laws of motion, the public has a wonky understanding of it but that's to be expected. You assert that physics has done this great job, and I agree it has and it is a subject that makes it easier. However, I do not see evidence that biology has failed, I see the contrary. ESPECIALLY today - just look at how much press biology is getting right now - the EvC controversy is making biology a more 'sexy' subject in its own right.
They say we don't need to go to the public - they need to come to us. They then complain that nobody understands what we are doing.
Except of course, there are plenty of people that go to the public. And in exactly the same way physicists complain about the way the media portrays the big bang, they complain about how the media misrepresents the theories. And then people like you like to imagine that scientists have the power to control the media.
The public voices we do hear(Dawkins etc) start by insulting the public who know little of the theory by calling them stupid and ignorant.
I've never heard Dawkins insult those who are not fully cognisant of biological theories. It certainly would hamper his book writing since basically all of his books are explaining evolution to those who aren't completely up to scratch with the ideas. Have you read any Dawkins? Or are you basing this on what his critics say about his recent controversial book? I find Dawkins to be an excellently patient explainer of ideas that I had previously been ignorant of, and at no point did he prefix anything with 'If you don't know anything about this chapter before reading it you are stupid'.
I will let you have the last word. I think we are going off topic here.
Sounds like a good excuse for me to include this video then. It's Dawkins giving a lecture on neo-darwinism (so is thus on topic - ZING!). If this is the last on the topic then we'll let watchers of the video judge Dawkins on this (I haven't had time to watch it all, but I look forward to it).

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 55 of 216 (409417)
07-09-2007 11:52 AM
Reply to: Message 53 by Cold Foreign Object
07-09-2007 11:37 AM


Re: Your opinion, Your Favorite
By implication said protest is saying that God is not excluded as an explanation in ToE. Where is God IN the ToE?
How about we reword your statement to be more inline with scientific thought:
quote:
an explanatory framework attempting to explain how populations of biological organisms may have changed with the passing of generations with no assistance from a Divine Creator explicitly necessary.
The Theory of Evolution is not an interpretation of data. That would be Natural History which is an interpretation of data that uses the explanatory framework that is the ToE. That is why that is cut out. It does not describe nature producing itself: It is only concerned about biology and nature existed a hell of a lot longer than life has so that is why that is cut out. Finally the ToE does not require the absence of a Divine Creator, it works equally well in a universe with or without one.

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Replies to this message:
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 Message 83 by Dr Adequate, posted 07-11-2007 10:11 AM Modulous has replied

Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 61 of 216 (409431)
07-09-2007 1:10 PM
Reply to: Message 59 by Cold Foreign Object
07-09-2007 12:53 PM


Re: Your opinion, Your Favorite
First, I don't like ("explanatory" and "explain") in the same phrase and sentence, this does not work well. But with this aside, I see no real difference between you and Johnson (or my slight alteration of Johnson since I did not put his definition in quote marks). So I guess we then agree? If so, will you answer some of our critics who disagree in this thread?
If you agree with my wording - great. I consider it different from your wording in several important ways. I point them out in my post.
Yes it is. ToE interprets data and evidence under Naturalism and Materialism presuppositions.
It really doesn't. Sure - one has had to examine data and draw conclusions from that data (that's called testing your theory) it is still a collection of proposed mechanisms.
The whole point of ToE is that Creator not needed to explain nature.
If you think that is the point of ToE - then you've gone horribly wrong. A theory is used to explain something. The theory of evolution is used to explain evolution. Evolution is change in population over time. We can use the theory to explain change from one generation to the next, or use it to explain much larger changes - say over the history of life on earth.
If you think otherwise it is no wonder you have such hostility towards it.

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 Message 59 by Cold Foreign Object, posted 07-09-2007 12:53 PM Cold Foreign Object has replied

Replies to this message:
 Message 63 by Cold Foreign Object, posted 07-09-2007 1:36 PM Modulous has replied

Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 73 of 216 (409492)
07-09-2007 8:53 PM
Reply to: Message 63 by Cold Foreign Object
07-09-2007 1:36 PM


Re: Your opinion, Your Favorite
So you are now a TEist?
I don't know what that is, sorry.
Can you produce any references for your view?
Easily. Just about any book on the theory of evolution. The best I've ever found is that the theory of evolution was the first working non-supernatural account for biological change and the origin of our species. A concept which shocked the world because the origin of man was the last bastion of the Abrahamic God, especially as it came at a time which the age of the earth started being calculated far in excess of Biblical accounts.
That isn't the point of the ToE, its a social consequence of it was when combined with facts from paleontology and geology (and later, genetics) in a Young Earth Christian society.
Where is God IN your theory?
I think I adequately described that in Message 55 -
quote:
an explanatory framework attempting to explain how populations of biological organisms may have changed with the passing of generations with no assistance from a Divine Creator explicitly necessary.
God is banished from Darwinian science and all science for that matter - not a matter of opinion.
God is not necessary for the science to work, that does not mean that God does not get involved - just that he isn't needed to get involved. This is the same of course as any modern scientific theory. God is just as 'banished' from the Germ theory or relativity etc etc.

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 Message 104 by Cold Foreign Object, posted 07-14-2007 3:15 PM Modulous has replied

Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 85 of 216 (409827)
07-11-2007 2:59 PM
Reply to: Message 83 by Dr Adequate
07-11-2007 10:11 AM


(1) It's not sufficient to exclude a divine creator. What about magic evolution pixies? We should make it clear that it excludes all supernatural causes, perhaps by explicitly stating that it is a scientific theory.
Feel free to append anything you want that is not required by evolution. You could even use natural things like 'a combustion engine'.
(2) That still wouldn't specify the theory of evolution, since it might describe, for example, Lamarckism. Or non-supernatural aliens, if it comes to that. So we still need to put in something about genetics and natural selection.
Of course it just describes what a scientific theory of evolution should do.
Which gets us back to the textbook-style definitions which have already been offered on this thread.
Most of which I agree with, still Ray was talking about what the Theory means to him, so I tried to correct some of the incorrect statements whilst keeping it in his paradigm.

This message is a reply to:
 Message 83 by Dr Adequate, posted 07-11-2007 10:11 AM Dr Adequate has replied

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