In message <
1aaf969f-e953-4091...@googlegroups.com>
Ray Martinez <
pyram...@yahoo.com> wrote:
> On Wednesday, March 4, 2015 at 9:44:47 AM UTC-8, Nick Roberts wrote:
> > > > you won't find rabbits in the precambrian.
> > >
> > > My real point was that the much touted example of "rabbit in the
> > > pre-Cambrian" should be disowned by Evolutionists because it does
> > > not entail an acceptable level of risk.
> >
> > But you should also recognise the "rabbits in the precambrian" is a
> > quote from Haldane when asked what evidence would destroy his
> > confidence in ToE; and that it is a shorthand for "any species for
> > which strong evidence can be found for existance very much prior to
> > ancestral species".
>
> He was actually talking about any land-dwelling quadruped.
He was? I'm not disputing your claim, but it seems a bit specific,
considering the context.
And why isn't "any land-dwelling quadruped in the precambrian" an
observation that would falsify ToE?
That you claim it could never happen (i.e. has no "risk") is an
implicit assumption that you accept ToE, or something very like it. If
God created all species by an act of will, surely he could produce a
land dwelling quaduped whenever the felt like it - and that includes
the precambrian. But you are certain that he didn't. How do you know
that? Perhaps he did, but they never fossilised. Or they did fossilise,
and all the rock has been transformed since. Or we simply haven't
looked in the right place.
So how do you know that he didn't?
And if someone finds such a fossil tomorrow, obviously you can't claim
that ToE has been thoroughly refuted, because you have stated that such
an observation isn't capable of refuting ToE. Is that really your
position?
> > This would include, for example, any amniote species being found in
> > the Devonian period or earlier.
> >
> > > > Similarly, everyone knows that if you drop a lead pellet and a
> > > > feather in a vacuum, then they will accelerate at the same
> > > > rate. So there is no risk associated with this experiment, so
> > > > it can't be used to falsify Newton's theory of gravity.
> > > >
> > > > Similarly, as I point out below, one of the great triumphs of
> > > > the theory is the prediction of the existence and location of
> > > > Neptune. But if you carry out that experiment again, there is
> > > > no risk associated, as Neptune hasn't disappeared. So you can't
> > > > use the prediction of the orbit of Neptune as an example of an
> > > > experiment that could have falsified Newton's theory of
> > > > gravity.
> > >
> > > I'm not sure what you're getting at?
> >
> > Where is the risk in finding Neptune by using the gravitational
> > interaction of its mass with that of closer planets? There is none
> > in the real world; so you can't use that to falsify Newton's theory
> > of gravity.
> >
> > In fact, can you name any single experiment that you could carry
> > out that would falsify Newton's Theory of Gravity? What carries
> > enough risk to satisfy your demand?
>
> I haven't study Newtonian gravity so I can't make the judgments
> you're making.
It really doesn't matter what I picked. It could have been the germ
theory of disease, atomic theory, or anything. According to your
interpretation of "risk", the more thoroughly a scientific theory has
been tested and withstood falsification, the harder and harder it is to
claim that it is scientific, as none of those experiments can now
falsify it.
Hence, your intepretation (and it is _your_ interpretation, and one
that Popper would never recognise) simpifies to "there is no such thing
as a scientific theory, because they are all either refuted or become
unfalsifiable".
Furthermore, that you haven't studied Newtonian gravity is irrelevant.
You should at least be able to understand the words that I used
(they're not technical), and try to follow the logic. And you can't use
the fact that you're not a student to ignore the entire argument -
ignorance is not the same as a refutation.
> > > > In fact, if you insist on there being risk associated with an
> > > > observation, _even if the theory is true_, then there is no
> > > > theory that can be truly falsified. Every time you carry out an
> > > > experiment and it doesn't falsify the theory, you can no longer
> > > > use that as an example of an experiment that can falsify the
> > > > theory.
> > >
> > > I only insist on a genuine risk because that's how falsification
> > > is defined.
> >
> > Only if you misintepret the definition. Risk only applies _if the
> > theory is inaccurate_.
>
> Ridiculous. You're wasting my time.
And you're wasting mine. If you invite me to put my arguments, only a
coward would then wave away my arguments without any attempt whatsoever
to address them".
One of your many flaws is that you seem to think that restating your
position is evidence in support of your position, which is pretty much
all that you have been doing in this thread. Another is your refusal to
even attempt to address the points that your opponents make.
Basically, you never seriously enter into a discussion: all you do is
harangue your opponent until either he/she gets bored, or you claim
something like "you're wasting my time", which is Ray-speak for "I
cannot present any evidence in support of my position".
> > If risk applies whether the theory is inaccurate or not, it's a
> > meaningless and useless test for any theory.
>
> I think you shouldn't say anymore unless you can support via a
> reference.
Even if I did, the chance that you would pay any attention to it is
minimal. You have a single secondary source that uses the word "risk",
and (like so many bibiolators) you weave elaborate fantasies about the
words, without ever seeking to understand the sentences.
> > > Again, you seem to be arguing for a watered down version.
> >
> > It may well be watered down according to your incorrect
> > interpretation. It's not watered down according to the Popper's
> > intended meaning.
>
> Then support what you say or stop saying it.
I would like you to support your interpretation. I accept your quote,
but there is a difference in agreeing that a word was used, and
accepting your intepretation of the word.
I have pointed out, time and again, that your intepretation leads to
ludicrous consequences, including the consequence that if that was what
Popper had actually meant, he would never have been taken in the
slightest bit seriously, as his entire philosophy of science would be
risible.
But you're uninterested in consequences, as it disagrees with your
interpretation of the word risk.
I have given my interpretation of the usage of the word, which (even if
you ignore the inane consequences of your interpretation) is at least
as valid as your own. You haven't even attempted to address my
interpretation, you just keep claiming that the use of the word risk
means that you are right.
So I return the challenge to you:
Support your claim that Popper meant that an observation must carry
risk, _even if the theory is correct_. If you cannot support that, then
your entire argument evaporates.
And quoting sentences that include the word risk without addressing the
validity or otherwise of the theory will not support your claim.
> > Please, for once in your life step back from the position you have
> > committed yourself to and think about it:
> >
> > What use is a way of disproving a theory, if you can't use it to
> > tell whether a theory is accurate or not? On my (and that of every
> > sane scientist and philospher of science), an experiment or
> > observation that doesn't match the theory can be taken to mean that
> > the theory doesn't hold. But on your definition (where risk of
> > failure is required even if the theory is accurate) it can't: that
> > an observation or experiment doesn't match the theory tells you
> > nothing about the validity or otherwise of the theory.
>
> You know I've been slow to respond to your replies. I've been walking
> around thinking about them. Trying to understand....trying to give
> you every benefit possible. You've taken Popper's theory and changed
> it to what you think it should have said while maintaining that what
> you say is what Popper not only said but meant. People do this all
> the time with theories. This tactic indicates that what you say is
> NOT what Popper said or meant.
I have done nothing of the sort. I have presented my intepretation of
the meaning of the word "risk", as meaning "there is a risk that the
observation will fail if the theory is unsound", which (given that
falsification is all about testing theories) would seem to be a
reasonable interpretation. Your interpretation, OTOH, requires that a
valid theory can be falsified by an observation, which is quite
unreasonable.
You keep claiming to know logic better than anyone else. Do you not
even recognise that your own intepretation is paradoxical?
Observation requires risk => theory can fail.
Theory fails observation => theory is invalid.
If an observation related to a valid theory requires risk, you get:
Observation requires risk => valid theory can fail.
Valid theory fails observation => theory is invalid.
Even by your standards of logic, you can surely see the problem here?
> Moreover, you keep assuming evolution an accurate theory.
In that case, you will no doubt be able to point out where this
assumption is made. Please do so.
The only assumption that I have made is that an observation can only
refute a theory if the theory is invalid.
Please explain the logic that allows you to falsify a theory, _whether
that theory is valid or not_. And it doesn't matter whether the theory
is ToE, Newton's theory of gravity, the germ theory of disease, or
Phlogiston theory.
You will notice that I include an _invalid_ theory (phlogiston) in that
list of theories. It's because it demonstrates the point of
falsification (albeit a long time before falsification was formalised).
It someone discovered a fossilised rabbit in the precambrian tomorrow,
ToE, if not thoroughly refuted, would require some major surgery to
survive, and what survived would have a lot of explaining to do.
> That based on this claim of fact the theory is only subject to a
> watered down version of falsification. This is why I'm having trouble
> understanding your arguments. You've created your own elaborate
> theory of falsification, which includes tests for accurate theories
> and other tests for inaccurate theories. Yet Popper wasn't talking
> about accurate or inaccurate theories. He was talking about what
> constitutes real science from pseudoscience.
I have explained the only sane interpretation of the word "risk"
associated with an observation that is in principle capable of refuting
a theory. You want to be able to refute a theory that is valid.
> Example of pseudoscience: A man stands in an African village snapping
> his fingers. Asked why he does such a thing? "Keeps elephants away."
> But there are no elephants in these parts. "See, it works."
Example of Ray's version of science: There is no science.
Or to answer your little story in a more real-world scientific way:
A man identifies a prediction of the ToE (e.g. faunal succession), and
goes looking for evidence to refute it. He fails. "But that doesn't
prove that it's right". "No, it doesn't. But it does mean that I
haven't yet proved that it's wrong".
This, Ray, is the whole point of falsification, and it seems to have
gone completely over your head (or possibly it hasn't but you're only
acting as if it had): The lack of fossilised rabbits in the
precambrian doesn't, by any any stretch of the imagination, mean that
ToE is right. It only means that so far, using that observation (and
millions of others in the field of genetics, morphology, etc) no one
has managed to provide any evidence that it is wrong.
Actually, that isn't right. There is loads of evidence that the ToE as
specified by Darwin is, if not wrong, at least very incomplete. As a
consequence, ToE today is not what Darwin wrote, whatever you may
think. It's had a number of enhancements and revisions. But the core
ideas of common descent and adaptive evolution are still solid.
> > > And don't forget: I have problems with the overall definition
> > > (objective criteria), so don't think I'm placing all the blame on
> > > you and your colleagues in evolutionary theory.
> >
> > It's not "me and my colleagues" that is the problem: it's your
> > bizarre interpretation of a statement that included the word
> > "risk".
>
>
http://www.talkorigins.org/faqs/comdesc/
>
> "Furthermore, a scientific explanation must make risky
> predictions---the predictions should be necessary if the theory is
> correct."
Risky, as in "risky in principle", not "risky even if the theory is in
fact valid".
Are you claiming that if a precambrian fossil rabbit was found
tomorrow, the ToE is not falsified? Because unless you _are_ claiming
that, then that observation is one that carries, at least in principle,
some risk.
Unless, of course, it is _you_ that is assuming that ToE is true, and
not me.
> > > > > Your beef is with Karl Popper and his disciples. His
> > > > > falsification theory was published a long time after Newton
> > > > > died.
> > > >
> > > > I have no particular beef with Popper, once some practical
> > > > issues are allowed for. What I have a beef with is your
> > > > insistence that experiments purported to falsify a theory
> > > > require risk _even if the theory is correct_.
> > >
> > > You can't make these types of statements when debating the
> > > veracity of the ToE with an opponent. You've assumed your
> > > conclusion or that which is in dispute.
> >
> > I have assumed nothing of the kind. What I have assumed is that
> > Popper understood that falsification only involved risk [if] the
> > theory is unsound.
>
> Completely false. You're placing theory changing facets into Popper's
> claims.
Not at all. I'm just intepreting the use of the word "risk" differently
to you. The fact that my interpretation of the term means that
Popperian falsification is a potentially useful scientific tool, while
your intepretation of the term means that (a) it's paradoxical, as it
requires that a valid theory can be disproved; and (b) Popper would
never have been heard of, beyond the poorly-suppressed laughter of a few
philosophers.
> > If the theory is sound, then (within it's intended domain) it can't
> > be disproven - not because it is unfalsifiable, but because all
> > attempts to falsify it have failed, and continue to fail.
>
> You're arguing original ideas and these should be explicated in a
> formal essay or paper. You shouldn't be initiating them on me in this
> context.
I'm not arguing anything of the kind. I'm simply pointing out something
that I would have thought was totally obvious: a theory is valid if and
only if it makes accurate predictions within its domain of
applicability; and as a consequence, a theory can't be falsified within
its intended domain and remain valid. That's sort of the point.
> > > Moreover, you can't refer to an experiment as fulfilling or
> > > showing potential falsification unless it involves a genuine
> > > risk. I didn't make up this rule.
> >
> > You did, however, miss the implication that risk is only meaningful
> > as a way of demonstrating that the theory is invalid. If the theory
> > (any theory, not just ToE) is sound (and complete), then there is
> > no experiment within its domain that can falsify it.
>
> I would like to see John Harshman comment on the above statement and
> the one before.
Feel free.
> > This, of course, never happens, especially in the messy world of
> > biology: what happens for well-supported theories (like ToE) is
> > that observations that do not match the theory are typically around
> > the edges, one-offs, or special cases. Such observations tend not
> > to falsify the theory entirely, just require that the theory
> > requires some modification or revision.
>
> But we were never assuming the core theory true (at least I wasn't).
Neither was I. That you thought I was is very possibly a consequence of
your apparent misunderstanding of falsification. ToE hasn't (yet) been
falsified. That doesn't mean it is true: it simply means that it has
survived all attempts to falsify it (albeit with some revision in areas
such as neutral drift).