by Joe Felsenstein
http://evolution.gs.washington.edu/felsenstein.html
In a
discussion here of
the views of the creationist Cornelius Hunter I posted a comment
with a summary of his views about Bad Design
arguments. I argued that
what he has just done is to admit that the hypothesis of a Designer is not
science, as it predicts every possible result. If you predict every possible
outcome, the ones that are seen and the ones that are not, then you have not
predicted anything!
At
his own blog Hunter objected strongly, saying that
Unfortunately these misrepresentations are typical of evolutionists. Not only
are evolution's metaphysical arguments from dysteleology, or bad design,
perfectly valid, they can also be quite powerful. Felsenstein's strawman that
we say otherwise would be bizarre if it wasn't so common.
Was I wrong?
Hunter certainly did endorse bad-design arguments in
a post on 27 July at his blog "Darwin's God".
He reacted to Jerry Coyne's example of the
bad design of the giraffe recurrent laryngeal nerve by saying that
Evolution has no scientific explanation for how the recurrent laryngeal nerve,
or any other nerve for that matter, evolved. It is a vacuous theory. But it
knows they must have evolved because God would not have done it that way.
In fact, evolution has no solid basis for even thinking these designs are
necessarily poor. This is more religion making its way into the argument, as
the assumption of poor design is itself a motif of evolutionary thought.
Hunter thinks arguments from bad design are potentially powerful, but
when Coyne makes one, Hunter argues that the path of the recurrent laryngeal
nerve might be a good one, and that Coyne can't prove that the design is
actually bad. And he will do that no matter where the nerve zigzags to.
Does he have a scientific theory about that nerve? I haven't noticed one.
This approach is not confined to bad-design arguments. Take
the evidence for common descent. Note
Hunter's reaction to David Penny's work
verifying common descent. Penny's paper compares the fit of common
descent to a null hypothesis of no common descent.
In that 1991 paper Penny and his collaborators
compared phylogenies inferred from 18 different protein loci. Using the
null hypothesis that each locus had a different, randomly
selected tree, they could firmly reject that and conclude in favor of
common descent,
as the 18 trees were far more similar than would occur at
random.
To Cornelius Hunter, the null hypothesis that Penny et al. used
attacks design or creation using non scientific premises that a design or
creation advocate would not recognize.
One immediately wonders: To avoid making this supposed religious
presupposition, what should Penny et al. have done? What are the “scientific
premises” that a design or creation advocate
would recognize?
If there are none, then the Design he speaks of is an infinitely
flexible hypothesis that predicts nothing, and thus is really not a scientific
hypothesis at all ... which is what I originally said. Hunter has objected
to my statement. So what in the way of a scientific hypothesis
does he offer instead?
136 Comments
Elon-Leon · 12 December 2009
Dont you think its great, creation, its design for hearing the beauty of sound.
Think ther is sound as a primal of the plyns, and until thee ear is designed it cannot be defined.
Here we are able to define such wonderous awe, which is, Sound, with that perfection of design, thee Ear.
Take time, keep strong, be watchful.
cs shelton · 12 December 2009
Anyone wanna clarify what elon-leon just said? Anyone else want to address what joe asked? On the latter point, I'd like someone to sum up the creationist's non-position so I don't have to wade through their effluvium to find it myself, and on the former I'd just like to know if anagram-margana actually conveyed a thought without having to decode it.
OgreMkV · 12 December 2009
DS · 12 December 2009
cs,
I believe that what Elon wrote is properly translated as follows:
"Twas brillig, and the slithy toves. Did gyre and gimble in the wabe: All mimsy were the borogoves, And the mome raths outgrabe."
fnxtr · 12 December 2009
Well s/he certainly seems to be playing Humpty-Dumpty with language.
John Kwok · 12 December 2009
Joe -
I haven't read much of Cornelius Hunter's nonsense, but does he contend, like Stephen Meyer, that it is possible to test how far a "design" has "degenerated" (When I read that in Meyer's book, I thought, "Oh no, the Creator is gonna get mad with Stevie boy".). WOuld be interesting to see whether Hunter buys Meyer's argument.
Thanks,
John
Joe Felsenstein · 13 December 2009
Robert Byers · 13 December 2009
Science has a method but its purpose is not to do the method but to discover the workings of the natural world.
The scientific method is not useful to origin subjects period.
Therefore I.D or YEC lines should be that origin subjects can only be explored by a weighing of evidence but not a testing of it.
It seems to I.d people and some YEC people they are doing the same work as their opponents but thats the point.
Predictions doesn't work in past and gone events. all that is left is the remnants of processes. Not the processes themselves.
Now I.d folk would say God has made a machine of the universe and so it can be open to science even about origins.
So God's fingerprints are all over the machine.
Yet God is not the machine. So complexity still only suggests or insists on God. God as a agent of influence is can';t be a part of investigation.
As Mr Hunter said, I think, prediction of a designer's work is not possible because of open options but predictions based on disorder/order can establish the hypothesis.
Disorder would not be a part of the order of a creator. So disorder can not be.
Frank J · 13 December 2009
Keelyn · 13 December 2009
DS · 13 December 2009
I believe that what Robert wrote is also properly translated as follows:
“Twas brillig, and the slithy toves. Did gyre and gimble in the wabe: All mimsy were the borogoves, And the mome raths outgrabe.”
But seriously, Robert doesn't seem to understand the meaning of the word "prediction" as used in the scientific method. You can add that to the list of all of the other words that he doesn't understand. I especially like the use of the new plu perfect subjunctive negation tense: is can';t.
Dave Luckett · 13 December 2009
Sylvilagus · 13 December 2009
Joe Felsenstein · 13 December 2009
386sx · 13 December 2009
I thought it used to be that the "designer dunnit" if it was impossible for nature to do it. Now I guess it's the designer dunnit if the odds are, like, ten million to one or something. Somebody must have sent out new fundie memos or something. Or maybe they just didn't read the old ones. Or maybe it never really mattered all along.
Scott · 13 December 2009
May I feed the troll, please? :-)
Someone argued on another blog that you can't make "historical" predictions. The example used was climate prediction. Say you have 100 years of data. In essence, if you want to make a real prediction, you have to make the prediction about the future, then wait 10 years to see if your prediction turned out to be correct. The term "model" was not used in the original argument.
It sounded reasonable to my wife, until I explained that you can take the last 100 years of data, build and train your model on only the first 90 years of data. Then, let your model run for 10 years. If the model "predicts" the last 10 years accurately, you know your model is reasonable.
I think one fallacy might be the notion that a "prediction" from a mathematical model is just like a "prediction" from the entrails of a dove: "prediction" = "guess", just like "theory" = guess".
I think the the more subtle fallacy of not being able to make "real" "predictions" about the past gets back to the fallacy that scientists front-load their experiments, if only by the very act of designing the experiment in the first place (or something like that). Everyone knows what happened in the last 10 years, so everyone "knows" the scientists must have biased their experiment to make it look good. If they didn't knowingly fudge the data, they must have done so unknowingly.
Even someone who is intelligent, but not versed in the art of mathematical modeling can get confused about how a model is developed and how it is used to make "predictions" about something you already know. "But, if your first prediction doesn't match the last 10 years of data, and you then go back and change the model until it does, aren't you also using the last 10 years of data to train the model too?" Sure, it could, if all you do is tweak your coefficients until the data fits all 100 years of data.
But let's say the mismatch between the first "prediction" and the last 10 years of data merely suggests that you overlooked some subtle factor in the first 90 years of data. If you then add new coefficients to your model, but still base them on only the first 90 years of data, then your next "prediction" is also reasonably free from influence from the last 10 years of data. Iterate until convergence.
I'm no modeling expert, but I've had enough experience to feel this is a reasonably accurate lay understanding of the process.
DS · 13 December 2009
Scott,
Of course you are right. However, it's even worse than that. Robert seems to think, (it's always hard to tell because Canadian is apparently his first language), that it is impossible to make predictions about what one would expect to find today based on models of past history. I know, it doesn't even make any sense. This guy should watch CSI more often.
Then again, on another thread, he claimed that the story of Jericho in the bible accurately predicted what archaeologists found. So, I guess even he doesn't believe his own nonsense. I guess he thinks that only biblical studies represent valid historical science. Or maybe it's only stuff he wants to believe that's valid. What a joke.
DS · 13 December 2009
Scott,
P.S.
You don't have to ask permission in order to feed the troll. As long as the people who run this site allow trolls like this to post with impunity, everyone should feel perfectly free to point out the logical errors in their arguments. The best you can do is to try and keep them on-topic. But since disruption is apparently their only goal, that can be difficult.
I am a big fan of sending off-topic nonsense to the bathroom wall. But, as long trolls are allowed to pollute these threads, reasoned responses such as yours seem appropriate.
Stanton · 13 December 2009
Wheels · 13 December 2009
Instead, what happens is that the scientists making the model set up a 'world' with certain laws of physics and then feed in a few boundary conditions to get the model moving as an approximate of Earth starting at a certain point in time. Since a lot of the physical systems being simulated are extremely complex, getting accuracy without hand-tuning things depends on powerful number-crunching. It wasn't until the late 80s or so when computers were powerful enough to run such models without scientists "handholding" them with constantly tweaked conditions or vague rules-of-thumb to make up for the lack of precise-but-complex physical rules.
The Curmudgeon · 13 December 2009
David Hume anticipated all of these arguments. The Wikipedia article on him has a whole section on this. See: The design argument.
Henry J · 13 December 2009
If a fossil that hasn't yet been found is predicted by theory and then found after the prediction was made, then the finding of it was a predicted future event at the time at which the prediction was made. It was not a prediction about the past, it was a prediction about a future event - the finding of the fossil.
Henry
socle · 13 December 2009
386sx · 13 December 2009
Michael J · 13 December 2009
I think that you can see Cornelius Hunter evolving his arguments. When he briefly appeared at ATBC, his argument was simply that old "we are looking at the same data but interpreting it differently". Byers has recently been making the same argument at ATBC.
I think that when it was pointed out to Cornelius that when you examine all of the data, his interpretation falls flat on its face. So you can see here that Hunter has retreated to his current (and weirder) argument about making any predictions is religious.
Byers, however, has yet to upgrade his argument and is defending the indefensible.
fnxtr · 13 December 2009
Byers "arguments" are the linguistic equivalent of The Weasel Ball.
That's the last time I'll make that comparison.
Rilke's Granddaughter · 13 December 2009
Midnight Rambler · 13 December 2009
stevaroni · 13 December 2009
Dan · 13 December 2009
RDK · 13 December 2009
@ KwoK: That's all fine and dandy, but I'll just keep holding my breath until Corny comes up with an actual routine for collecting data about degenerate design.
This should be fun.
RDK · 13 December 2009
Steve P. · 13 December 2009
RDK · 13 December 2009
fnxtr · 13 December 2009
Steve P. · 13 December 2009
Wheels · 13 December 2009
Joe Felsenstein · 13 December 2009
Registered User · 13 December 2009
A bullet hole appears in a victim’s head.
Forensic science says: “I can use ballistics to trace that bullet to the specific gun that originated it.”
Robert Byers says: “The scientific method is not useful to origin subjects period.”
A blackmail letter appears on a victim’s desk.
Forensic science says: “I can use fingerprints on that paper to find who originated it.”
Robert Byers says: “The scientific method is not useful to origin subjects period.”
A new comet appears in the sky.
Astronomical science says: “I can calculate that comet’s orbit and find where it came from before we observed it.”
Robert Byers says: “The scientific method is not useful to origin subjects period.”
Anthrax is mailed in envelopes to congressional offices.
Microbiological science says: “I can trace that strand of anthrax back to the lab that originated it.”
Robert Byers says: “The scientific method is not useful to origin subjects period.”
No need to be "technical."
Housewife says: "I put a cake in the heated oven and now the same cake is in the oven but it is baked."
Robert Byers says: "The scientific method is not useful to origin subjects period."
This is why creationists are scumball liars who can't help themselves. They think they have a different "worldview" but it's no different from anyone else's. They just enjoy pretending that it's different and telling self-serving lies in certain contexts. It actually makes them feel better to behave this way.
It's a form of mental illness, albeit benign in most instances and indistinguishable from profound ignorance.
DS · 13 December 2009
Steve wrote:
There is no irrefutable evidence for Darwin's (and TMS) version of evolution, where small non-teloeological, undirected, step-wise fortuitous mutations build up, creating emergent layers of biological complexity.
There certainly is, you just couldn't be bothered to look at it.
Stanton · 14 December 2009
SWT · 14 December 2009
alias Ernest Major · 14 December 2009
Dan · 14 December 2009
Frank J · 14 December 2009
Welcome back, Steve P.
I need to remind everyone that you have at least as many problems with Hunter's "agnostic age" "theory" as you have with evolution. Hunter's "theory" allows (if not commits to) absurdly recent ages that apparently preclude the common descent that you and Michael Behe concede. But I guess you'll let Hunter off the hook because he's one of those poor "expelled" underdogs. Which he wouldn't be if he stated his own hypotheses of what the designer did, when and how, and tested them on their own merits.
Dave Lovell · 14 December 2009
DS · 14 December 2009
alias Ernest Major wrote:
"But unimpugnable would be a better choice of word that irrefutable. (T.o's great debunker of ID, Tony Pagano, likes unambiguous.)"
Right. But he didn't refute anything, nor did he impugn anything. He didn't even read anything. What's more, he never provided any alternative explanation. All this guy has got is "I don't believe it". Since he is abysmally ignorant of even the most basic biological concepts, his opinion is completely worthless.
Now if this guy actually concedes common descent as Frank observed, exactly how does he think that it is supposed to work if there is no competition or selection? Did god create each species from other species by two million separate divine interventions? Yea, that makes lots of sense. Much simpler that all that complicated competition and selection stuff. You don't even have to read a book to understand that nonsense.
phantomreader42 · 14 December 2009
Hawks · 14 December 2009
Joe Felsenstein · 14 December 2009
Mike Elzinga · 14 December 2009
John Stockwell · 14 December 2009
Why discuss design at all? Science is about *process*. Science is not about is not about "ultimate causes" or "purpose and meaning".
RBH · 14 December 2009
Frank J · 14 December 2009
harold · 14 December 2009
Brenda · 15 December 2009
"I argued that...If you predict every possible outcome, the ones that are seen and the ones that are not, then you have not predicted anything! "
Don't we have pretty much the same problem?
"Evolution explains more complexity, and more simplicity. It explains why flight arose in some birds, but was lost in others. With evolution, organs and genomes can become more complicated, or more streamlined. Eyes emerge through evolution, but eyes are also lost by evolution. Evolution makes the cheetah fast but the sloth slow. By evolution, dinosaurs grow to skyscraper size, and hummingbirds grow tiny. With evolution, peacocks grow more flashy and crows more black, giraffes tall and flatworms flat. Evolution explains predator and prey, loner and herder, light and dark, high and low, fast and slow, profligacy and stinginess, terrorism and altruism, religion and atheism, virtue and selfishness, psychosis and reason, extinction and fecundity, war and peace. Evolution explains everything. "
Robert Byers · 15 December 2009
Robert Byers · 15 December 2009
Frank J · 15 December 2009
Steve P. · 15 December 2009
RBH · 15 December 2009
Joe Felsenstein · 15 December 2009
Joe Felsenstein · 15 December 2009
DS · 15 December 2009
DS · 15 December 2009
Robert wrote:
"Not the same thing.
Origin subjects are not just about past events but the processes are past events and so explain the events of the past.
A bullet in the head is not a past process but a modern one even if in the past the guy took a bullet.
The evolution of a bacteria to a a bug to a bear is not a testable thing. Its all over and gone. The creatures said to be intermediate and the processes claimed to have been happening.
Testing past and GONE processes and events/results is mostly impossible. So Origin subjects can't claim the prestige of science.
Anything about the unseen past can only weigh evidence but not test it.
how can it be tested?"
Jericho is not just about past events but the processes are past events and so explain the events of the past.
Walls falling down is not a past process but a modern one even if in the past the walls fell down.
The evolution of a bacteria to a a bug to a bear is a testable thing. Its all over and gone, but like everything else it has left evidence. The creatures said to be intermediate and the processes claimed to have been happening have been identified.
Testing past and GONE processes and events/results is absolutely possible. That is the way that archaeology works. That is the way that forensics works. Get a clue.
Anything about the unseen past can weigh evidence and test it.
how can it be tested? By confirming the predictions of the hypothesis. By examining the evidence left behind. By the same methods that you claimed were valid when studying biblical archaeology or using the same methods used in forensics.
See Robert, you may desperately need to believe that studying the past is outside of the realm of science, but you are dead wrong. Just admit it go away.
eric · 15 December 2009
DS · 15 December 2009
Brenda wrote:
"Don't we have pretty much the same problem?"
Actually, no we don't. Evolutionary theory absolutely does NOT predict every possible outcome. There are many potential observations that would be completely impossible for modern evolutionary theory to explain. Some would require a complete revision of all of the history of life on earth. But some would be completely inconsistent with the most fundamental aspects of evolutionary theory. In this case, the theory could not be modified in order to account for the observations. So, either the theory would be falsified, or some other explanation outside of evolution would be necessary.
One example of such an observation would be if the nested hierachy of genetic similarities did not correspond to the order of appearance of major groups in the fossil record. Another would be a completely different genetic code in an organism nested deeply within a clade with the ancestral genetic code. There are many other such potential observations, most of which Darwin could never even have imagined, let alone forseen. Thing is, none of these things has ever been observed, so the theory remains unfalsified - for now.
If creationists had the courage of their convictions, they would be out there looking for such evidence. Since they don't, one can only conclude that even they know they are completely wrong.
RBH · 15 December 2009
Hawks · 15 December 2009
DS · 15 December 2009
Some unknown genius wrote:
"Evolution explains more complexity, and more simplicity. It explains why flight arose in some birds, but was lost in others. With evolution, organs and genomes can become more complicated, or more streamlined. Eyes emerge through evolution, but eyes are also lost by evolution. Evolution makes the cheetah fast but the sloth slow. By evolution, dinosaurs grow to skyscraper size, and hummingbirds grow tiny. With evolution, peacocks grow more flashy and crows more black, giraffes tall and flatworms flat. Evolution explains predator and prey, loner and herder, light and dark, high and low, fast and slow, profligacy and stinginess, terrorism and altruism, religion and atheism, virtue and selfishness, psychosis and reason, extinction and fecundity, war and peace. Evolution explains everything. "
Exactly. Thanks for describing the tremendous explanatory power of one of the most tested theory in science. Evolution explains everything that we actually observe about living things. What is doesn't explain is all of the potential observations of things that have never been shown to exist. Evolution is falsifiable, it just hasn't been falsified.
If you want to prove evolution wrong, you will have to come up with an observation that it cannot explain rather a list of things that are observed that it can explain. Lack of imagination does not invalidate evolutionary theory.
As Joe pointed out, theories correctly explain lots of things. That is why theories are useful. Just don't confuse everything that is actually observed with everything that could potentially be observed.
fnxtr · 15 December 2009
"Would not science, observing apparent design, seek to confirm it first, rather than deny it? i.e. things appear designs so lets investigate to confirm whether it is designed or not? Sound logical and reasonable on its face." -- Steve P.
Well, have at 'er, Steve! Go ahead, investigate to your heart's content! The DI gets millions of dollars every year, maybe they could channel a few bucks here and there for actual, you know, science or something.
Show your work, Steve P., that's all we're asking. Show your work. "This looks designed" and number juggling are not going to cut it in the real world.
Thing is, as has been pointed out above, it's been done. Looking for design, researchers found none. They found evolution. Suck it up, princess.
John Stockwell · 15 December 2009
Mike Elzinga · 15 December 2009
Rilke's granddaughter · 15 December 2009
Mike Elzinga · 15 December 2009
Matt G · 15 December 2009
harold · 15 December 2009
Hawks · 15 December 2009
I have to disagree with posters who claim that evolution (or any other theory for that matter) is falsifiable. A theory consists of a combination of any number of hypotheses. It any of these hypotheses were wrong it would not necessarily mean that the theory was also wrong. Moreover, a hypothesis that might appear wrong might not actually be so since it might itself depend on another incorrent hypothesis.
An example that is often brought up as a potential falsifier of evolution is the discovery of a Devonian bunny (true mammals are thought to have first appearad hundreds of million years after the Devonian). Such a discovery could certainly shake up a lot about what we know about evolution - or perhaps not. Which of the following is more likely to be accepted (I realise that I'm provide a false trilemma, but I'm just trying to make a point):
1. A lot about what we know about common ancestry and evolutionary "progress" is wrong.
2. The methods for dating the bunny was wrong.
3. The fossil bunny is a fake.
I vote for 2 or 3 (potentially in reverse order).
Note: I have come to realise in the last few weeks that my ability to explain my thoughts is even worse than I originally thought (and I never thought I was any good to begin with). Because of this, I'll supply the following link to a Wikipedia article which explains what I wrote above in more detail and, more to the point, it does so much better.
http://en.wikipedia.org/wiki/Confirmation_holism
eric · 15 December 2009
Mike Elzinga · 15 December 2009
harold · 15 December 2009
sylvilagus · 15 December 2009
Dan · 15 December 2009
Dan · 15 December 2009
Frank J · 16 December 2009
DS · 16 December 2009
Robin · 16 December 2009
TomS · 16 December 2009
harold · 16 December 2009
Hawks · 16 December 2009
Hawks · 16 December 2009
harold · 16 December 2009
Hawks · 16 December 2009
I think we might have to go back a step and that I have to ask what we actually mean by "falsifiable". Do we mean in Popper's original deductive sense. Do we mean his later version where probability statements were included? Is the theory outright rejected or merely modified? Or even that it can only be falsified when a better theory is proposed? Or something else? And when it is falsified, why is it the theory rather than some hypothesis that is falsified.
Hawks · 16 December 2009
harold · 16 December 2009
harold · 16 December 2009
DS · 16 December 2009
Steve wrote:
"It would seem science is utterly unable to answer and necessarily ambivalent to the question of teleology either way. Yet many proponents of TMS are sure that evolution is non-directed and non-teleological. More so, they ironically employ many teleological analogies of co-option, cooperation, and competition in order to explain supposedly non-teleological processes. Now why is that?"
No they don't. You just keep claiming that they do. Now why is that?
Look Steve, there is nothing "teleological" about competition. It is not an analogy, it is a documented mechanism operating in nature. Why do you refuse to acknowledge this? Do you remember when you claimed that lions have no competition? Well, as I pointed out at the time, you were dead wrong. Now I know how much you love scientific references, so here are two more for you to read:
Caro and Stoner (2003) The potential for interspecific competition among African carnivores. Biological Conservation 110(1):67-75.
Cooper (1991) Optimal hunting group size: the need for lions to defend their kills against loss to spotted hyaenas. African Journal of Ecology 29:130-136.
Now Steve, when you have proven that you have read, understood and refuted these papers, then perhaps someone one will care about your opinion. Until then, quit making a fool of yourself.
harold · 16 December 2009
Wheels · 16 December 2009
eric · 16 December 2009
Frank J · 16 December 2009
harold · 16 December 2009
Frank J -
I just noticed that to a large degree you, I and Bailey are saying exactly the same thing.
The commonality is that they don't care whether or not the evidence favors evolution.
Whether they secretly accept evolution, or have defenses in place to prevent that, we can't know.
What we can observe is that they will argue against it, no matter what the evidence, and they will attempt to use legal and political strategies to force submission of those who defend science and push anti-evolution on the uniformed.
It still boils down to an authoritarian agenda. Whether you hide the truth from the peasants, or believe your own propaganda, saying anything to win, and focusing on the courts, the high schools, and the popular press in what is ostensibly a "scientific" debate, is what it is.
tresmal · 16 December 2009
Falsify Evolution? Easy (in principle.) Demonstrate-empirically demonstrate-the existence of a barrier between "micro"- and "macro"evolution.
TomS · 16 December 2009
Frank J · 17 December 2009
Hawks · 17 December 2009
Hawks · 17 December 2009
Hawks · 17 December 2009
Hawks · 17 December 2009
harold · 17 December 2009
harold · 17 December 2009
Stuart Weinstein · 17 December 2009
Stuart Weinstein · 17 December 2009
Dan · 17 December 2009
Hawks · 17 December 2009
Hawks · 18 December 2009
Hawks · 18 December 2009
Wheels · 18 December 2009
Rolf Aalberg · 18 December 2009
Dan · 18 December 2009
Frank J · 18 December 2009
DS · 18 December 2009
Hawks,
The theory of evolution could have been falsified in exactly the same way that the theory of a flat earth was falsified. Until evidence was found that the earth was not flat, that was the most reasonable explanation for all of the observations. Now, it is unlikely that the theory that the earth is round will ever be falsified. It may be modified to account for slight variations in shape, but in order to be falsified, some evidence must be found that the earth is some shape other than round. And that alternative theory must account for all of the available evidence better than the theory that the earth is round or it will not be preferred.
In exactly the same way, the theory of evolution has been tested. The fossil record has revealed that the simplest organisms appear first and the more complex organism only appear later. If this pattern were not found, evolution would have been falsified. Likewise, the nested hierarchy of genetic similarities, found only long after Darwin was gone, is completely consistent with the order of appearance of major groups in the fossil record. Once again, the theory could very well have been falsified, it just wasn't. Now, many potential observations could still falsify the theory of evolution, but they will also have to account for all of the available evidence better than the theory of evolution already does. That seems unlikely at this point, but that doesn't mean that the theory of evolution is not falsifiable or that it is not science, any more than the theory that the earth is round is not science.
eric · 18 December 2009
As far as I can tell, Hawks' arguments amount to claiming that under some definitions of the terms "theory" and "falsifiable," the statement "theories are not falsifiable" is true. Whoopeee! Philosophical navel-gazing at its best.
Hawks,
If you're right, why should we care? So what if scientific theories are not falsifiable under some definition of falsifiable? Until you show why your particular definition is relevant, your argument - even if true - remains about as valuable as the philosophical statement "the absolute is infinite."
harold · 18 December 2009
Stuart Weinstein · 18 December 2009
Stuart Weinstein · 18 December 2009
Hawks · 18 December 2009
As Duhem argued, theories on their own can't make predictions. Auxiliary propositions (and I assume hypotheses in general) need to be used as well. That would mean that when a hypothesis' predictions fail, the predictions of the theory fail as well. This is, in essence, what a falsification is meant to be. Therefore, it would seem that my reason for claiming that theories aren't falsifiable was wrong.
I wish to thank everyone who was involved in this discussion. It was a pleasure this time as well.
Joe Felsenstein · 2 January 2010
Re: my original post in this thread (remember that?)
Cornelius Hunter has now posted at his blog Darwin's God a response calling on me to defend the absolute requirement for methodological naturalism. But he has not answered my call for him to put forward his preferred alternatives. I have now replied to his post at his blog (comment of 8:50pm) by once again calling for him to show us, in the case of David Penny's test of common descent, what alternative hypothesis he has that make any prediction. Will the Missing Scientific Hypothesis stay missing? Stay tuned ...
Flint · 2 January 2010
Hunter's general complaint seems to be that IF there are in fact any non-natural causes and effects out there, the scientific method is incompetent to evaluate them, and that it's self-serving and circular to demand a scientific approach to something science, in principle, is inappropriate to apply.
I would suggest that the proper methodology would be to pray for enlightenment. To the best of my knowledge, no supplicant has EVER had his prayers answered by being informed that his opinion is wrong. So Hunter could confidently expect his non-natural methodology to ratify his preconvictions according to the methods and standards he prefers.
Another time-tested metholdology is to either ignore or censor away inconvenient questions, or permanently ban anyone presuming to ask any. This is technically known as the "LA LA LA I CAN'T HEAR YOU!" method, and seems to have an outstanding track record. I've never seen a single argument "lost" by anyone who's used it, in his opinion.
Joe Felsenstein · 3 January 2010
Wheels · 3 January 2010
Whoo, that's the first time I've seen someone with all those fancy honors so blatantly confusing "artificial" with "magical."
Joe Felsenstein · 3 January 2010
DS · 3 January 2010
Joe wrote:
"...my take on Hunter’s position is different. I think he is saying instead that scientists, by limiting themselves to considering only natural explanations, are preventing themselves from finding the truth."
That would be true IF there were supernatural causes that affect nature. Of course, then the scientific method would be practically useless in that case. That is why creationists are always going on about scientists not knowing everything. The God of the gaps mentality is alive and well.
The big problem is that, so far at least, there is no evidence of any supernatural causes. And even if some were discovered, they would probably represent only a miniscule portion of the things observed in nature. So why abandon all of science for that remote possibility? Meanwhile, science marches on discovering things about the natural world. I think science envy is really what motivates many people to rant so incessantly against science.
For example, even if life originated by some miracle, evolutionary theory is still valid in explaining how it has evolved since, something it would have apparently been created to do. So, when creationists harp on the details of abiogenesis, as if it were some kind of argument against evolution, they are really fighting the wrong losing battle.
Joe Felsenstein · 3 January 2010
Wheels · 3 January 2010
Wheels · 4 January 2010