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Author Topic:   Induction and Science
Straggler
Member (Idle past 95 days)
Posts: 10333
From: London England
Joined: 09-30-2006


Message 631 of 744 (593355)
11-26-2010 12:36 PM
Reply to: Message 629 by Jon
11-26-2010 12:26 PM


Re: Nope... That's not the Point Either
Can you explain how your latest stance regarding the inevitable role of inductive reasoning in science is compatible with this:
Jon writes:
"There is, of course, no such thing as 'induction'. All conclusions are arrived at deductively" Message 178

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 Message 629 by Jon, posted 11-26-2010 12:26 PM Jon has replied

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 Message 714 by Jon, posted 12-01-2010 10:12 AM Straggler has replied

  
nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 632 of 744 (593390)
11-26-2010 7:04 PM


A general comment
When I started this discussion, I knew that most people disagreed with me. So I expected disagreement in this thread.
What I did not expect, is the large number of bogus arguments that would be presented.
So sure, many people believe that we use induction. But they cannot actually demonstrate that. Induction is a core assumption of AI and machine learning research, where they call it "pattern induction." However, machine learning has not produced anything at all comparable to human learning. That ought to count as evidence against induction, but people don't look at it that way.
The basic argument for induction is of this form:
  • It sure looks as if science works by finding patterns in nature;
  • I can't think of any other possibility;
  • therefore they must be using induction.
But that is really the argument from ignorance. It is the type of reasoning that we often see coming from ID proponents, and they are criticized for such arguments.
There's nothing wrong with forming a hypothesis that induction is used, and then setting out to find evidence for and against that hypothesis. I view the pattern induction research in machine learning to be just such a research program. But to assume the conclusion before the program has has completed is just bad reasoning. To repeatedly use an argument from ignorance is just bad reasoning.
Why can't people just state that they disagree with me, but admit that they have no proof that I am wrong? That's what should have been the response.
I won't be responding to all of the replies to my earlier posts. It is getting too repetitious. I'll comment on only a few.

Jesus was a liberal hippie

Replies to this message:
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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 633 of 744 (593391)
11-26-2010 7:15 PM
Reply to: Message 614 by Straggler
11-25-2010 7:54 PM


Re: Nwr: "Scientific theories have nothing to say about how nature behaves"
Straggler writes:
Popper was essentially a realist. You have said "Scientific theories have nothing to say about how nature behaves".
I'm a realist. But I happen to not agree that scientific theories are descriptions of reality.
Straggler writes:
Popper's entire thesis rested on falsification.
However, the evidence does not support falsification. I'll agree that Popper's claim to having solved the induction problem rests on his falsification thesis. But his claim that scientists don't actually use induction does not rely on falsification.
I'll grant that Popper was mistaken about having solved the induction problem.

Jesus was a liberal hippie

This message is a reply to:
 Message 614 by Straggler, posted 11-25-2010 7:54 PM Straggler has replied

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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 634 of 744 (593392)
11-26-2010 7:21 PM
Reply to: Message 616 by Straggler
11-25-2010 8:04 PM


Re: Nwr: "Scientific theories have nothing to say about how nature behaves"
Straggler writes:
No. You should take it as a challenge to show how the followng is not logically or evidentially valid:
"You cannot make scientific predictions (or conclusions pertaining to future events) without first inductively concluding that nature will continue to operate as it has been observed to behave thus far."
That's a good example of using the argument from ignorance. You can't think of an alternative, and therefore you assert that it must be true.
That you can't think of an alternative is not evidence. It might be a reason for hypothesizing that induction is used. Whatever happened to the idea of subjecting hypotheses to critical testing?

Jesus was a liberal hippie

This message is a reply to:
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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 635 of 744 (593393)
11-26-2010 7:23 PM
Reply to: Message 617 by Stephen Push
11-25-2010 8:21 PM


Re: Nwr: "Scientific theories have nothing to say about how nature behaves"
Stephen Push writes:
Scientific predictions always assume general principles (e.g., the uniformity of nature) that can be derived by no method other than inductive reasoning.
I am still waiting for the proof that they can be derived by no method other than inductive reasoning.

Jesus was a liberal hippie

This message is a reply to:
 Message 617 by Stephen Push, posted 11-25-2010 8:21 PM Stephen Push has replied

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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 636 of 744 (593394)
11-26-2010 7:28 PM
Reply to: Message 618 by Modulous
11-25-2010 8:21 PM


Re: What would induction in science look like
Modulous writes:
But my overall question, the point of the words I wrote was to try to get you to tell me what would a clear use of induction look like?
If a peer reviewed article were to publish 1000 data point, and then assert "therefore, by induction, statement x is always true", that would seem to be a clear use of induction. At least it would if statement x applied to many more than 1000 possible cases; otherwise it would be proof by exhaustion (exhausting all possibilities).

Jesus was a liberal hippie

This message is a reply to:
 Message 618 by Modulous, posted 11-25-2010 8:21 PM Modulous has replied

Replies to this message:
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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 637 of 744 (593395)
11-26-2010 7:31 PM
Reply to: Message 620 by Modulous
11-25-2010 8:32 PM


Re: Universal Principles
nwr writes:
The Pythagorus theorem is still a general principle that is derived by deductive reasoning.
Straggler writes:
But is it not a particular theorem that was derived from more general principles of geometry?
Agreed, but I don't see the relevance.

Jesus was a liberal hippie

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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 638 of 744 (593396)
11-26-2010 7:35 PM
Reply to: Message 624 by Stephen Push
11-25-2010 11:54 PM


Re: What would induction in science look like
Stephen Push writes:
Generalized conclusion:
More generally, we suggest that historical contingency is especially important when it facilitates the evolution of key innovations that are not easily evolved by gradual, cumulative selection.
That reads more as a proposed hypothesis, rather than as an inductive conclusion.

Jesus was a liberal hippie

This message is a reply to:
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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 639 of 744 (593397)
11-26-2010 7:42 PM
Reply to: Message 625 by Stephen Push
11-26-2010 12:10 AM


Re: Nwr: "Scientific theories have nothing to say about how nature behaves"
nwr writes:
I'm still waiting for the citation to a peer reviewed scholarly article that decisively demonstrates that Popper was wrong about induction.
It's an interesting paper. It aims at making a persuasive argument, but it is not a refutation.
It does correctly point out some problems with Popper's thesis, particularly in the way it uses corroboration. But it doesn't address the reason that Popper disagrees with induction (the reason is already in the text I quoted from SEP in Message 600, though it seems that reasoning is invisible to most of participants in this thread).

Jesus was a liberal hippie

This message is a reply to:
 Message 625 by Stephen Push, posted 11-26-2010 12:10 AM Stephen Push has replied

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crashfrog
Member (Idle past 1497 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 640 of 744 (593398)
11-26-2010 7:50 PM
Reply to: Message 632 by nwr
11-26-2010 7:04 PM


Re: A general comment
So sure, many people believe that we use induction. But they cannot actually demonstrate that.
Four years later, I'm still waiting for you to tell me what else is left besides induction.

This message is a reply to:
 Message 632 by nwr, posted 11-26-2010 7:04 PM nwr has replied

Replies to this message:
 Message 641 by nwr, posted 11-26-2010 7:59 PM crashfrog has replied

  
nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3


Message 641 of 744 (593399)
11-26-2010 7:59 PM
Reply to: Message 640 by crashfrog
11-26-2010 7:50 PM


Re: A general comment
crashfrog writes:
Four years later, I'm still waiting for you to tell me what else is left besides induction.
I have actually been doing that in several of my posts. But it seems to be invisible to people reading the thread.
In any case, it doesn't matter. That you don't know of other possibilities does not prove that there are no other possibilities.

Jesus was a liberal hippie

This message is a reply to:
 Message 640 by crashfrog, posted 11-26-2010 7:50 PM crashfrog has replied

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Straggler
Member (Idle past 95 days)
Posts: 10333
From: London England
Joined: 09-30-2006


Message 642 of 744 (593400)
11-26-2010 8:07 PM
Reply to: Message 634 by nwr
11-26-2010 7:21 PM


Re: Nwr: "Scientific theories have nothing to say about how nature behaves"
If I put a piece of potassium in a glass of water what does science tell us will happen?
Nwr writes:
Straggler writes:
Can science reliably and accurately make conclusions about things which have not yet occurred based on the principles derived from what has gone before?
No.
As long as your description of science denies the ability of science to make highly accurate and reliable (albeit tentative) conclusions about the future behaviour of natural phenomena your argument remains entirely refuted. Because science indisputably can and does do this.
Nwr writes:
You can't think of an alternative, and therefore you assert that it must be true.
You have presented no alternative. All you have done is deny the ability of science to do the things science is demonstrably very adept at. Dismissed by you as "guesses" and " opinions". Because your false pet theory cannot allow such conclusions to be anything else. No matter how inappropriate these descriptions are given the phenomenonal (albeit imperfect) reliability and accuracy that science can and does achieve.
Nwr writes:
Whatever happened to the idea of subjecting hypotheses to critical testing?
Your hypothesis that science is unable to reliably and accurately (albeit tentatively) make conclusions about things which have not yet occurred based on the principles derived from what has gone before has been critically tested. And it has failed. Science can and does do this.
If there is some entirely non-inductive explanation for the ability of science to do what it so undeniably successfully does then neither you nor anyone else has yet presented it.

This message is a reply to:
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Straggler
Member (Idle past 95 days)
Posts: 10333
From: London England
Joined: 09-30-2006


Message 643 of 744 (593401)
11-26-2010 8:22 PM
Reply to: Message 637 by nwr
11-26-2010 7:31 PM


Deducing Pythag
Panda writes:
By definition: you cannot make general/universal rules/laws using deductive reasoning.
Nwr writes:
Who came up with that absurdity? It is refuted on just about every page of a mathematics book.
Nwr writes:
The Pythagorus theorem is still a general principle that is derived by deductive reasoning.
Mod writes:
But is it not a particular theorem that was derived from more general principles of geometry?
Nwr writes:
Agreed, but I don't see the relevance.
Then I suggest that you read what has been written by those including yourself.

This message is a reply to:
 Message 637 by nwr, posted 11-26-2010 7:31 PM nwr has seen this message but not replied

  
Straggler
Member (Idle past 95 days)
Posts: 10333
From: London England
Joined: 09-30-2006


Message 644 of 744 (593402)
11-26-2010 8:32 PM
Reply to: Message 633 by nwr
11-26-2010 7:15 PM


Re: Nwr: "Scientific theories have nothing to say about how nature behaves"
Nwr writes:
I'm a realist. But I happen to not agree that scientific theories are descriptions of reality.
So (from this thread alone) you are a realist, instrumentalist Popperian who doesn't think that scientific theories are descriptions of reality, who does not rate falsification as particularly important and who advocates a form of science that is unable to draw reliable and accurate (albeit tentative) conclusions about something as simple as the physical behaviour of my soon to be dropped pen. Nwr: "Scientific theories have nothing to say about how nature behaves".
Can you not see what a confused muddle that is? Nevermind being entirely divorced from anything that actually goes by the name of science.

This message is a reply to:
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Stephen Push
Member (Idle past 4889 days)
Posts: 140
From: Virginia, USA
Joined: 10-08-2010


Message 645 of 744 (593419)
11-27-2010 1:03 AM
Reply to: Message 632 by nwr
11-26-2010 7:04 PM


Re: A general comment
nwr writes:
But that is really the argument from ignorance.
You either do not understand what an argument from ignorance is or you have not been paying attention to our posts.
From the Skeptic's Dictionary:
The argument to ignorance is a logical fallacy of irrelevance occurring when one claims that something is true only because it hasn't been proved false, or that something is false only because it has not been proved true.
Positive evidence has been presented here that scientists use induction. Perhaps you don't find the evidence compelling, but those of us defending the proposition that scientists use induction are not saying that the proposition is true only because it hasn't been proved false.

This message is a reply to:
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