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3.0 out of 5 stars The two Kuhns, August 12, 2001
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This review is from: The Structure of Scientific Revolutions, 3rd Edition (Paperback)
Thomas Kuhn performed a signal service for historiography of science by studying how new ideas and new ways of thinking displace the old. He invented the term 'paradigm shift' to describe what happens when 'normal science' runs into 'anomalies' and enters a 'crisis', which in turn leads to a 'scientific revolution'. Nobody had heard of such things before, so Kuhn had a scoop. He sketched some historical examples in iconoclastic style; the result is this short book, first published forty years ago and still wowing Cultural Studies students today.

Much of what Kuhn the historian of science says here is sensible and well taken. It has certainly been influential, perhaps in ways the author never intended, and should be read for that reason. But there are odd omissions. The greatest paradigm shift in physics since Newton - the adoption of fully-fledged quantum mechanics after 1925 - finds no significant place in this study. Eminent physicists, including Einstein, and even Schrodinger, one of its founders, regarded the new paradigm with deep distaste on aesthetic and philosophical grounds. Yet the methodology was adopted universally almost at once. What sociological factors, what structures of power and patronage brought this about? We are not told.

It is when Kuhn puts on his philosopher-of-science hat and tells us about the 'incommensurability of paradigms' that we should question what he means, and more especially what some people have read into it. The idea is that Archimedes or Aristotle, encapsulated in their ancient world-view, would have been unable to see what Newton was getting at in his 'Principia'; and likewise Newton if you gave him a copy of Dirac's 'Quantum Mechanics'. This has been held to have implications for epistemology, viz: it is a mistake to think of the evolution of science (or any rational endeavor) as 'progress' in the sense of bringing us closer to an accurate picture of the world. Kuhn's position can be likened to Darwinian evolution: progress *from*, yes; progress *towards*, no. There is room here for fancy footwork. But the finer points are lost on some who simply cheer it as a poke in the eye for rationality.

If an epochal break can be found anywhere in the history of science, it is in the transition from the Aristotelian to the modern world-view which took place in early modern times. Since then nothing remotely like it has happened. The training of physicists still begins with a detailed study of Newtonian mechanics, which for many purposes, from shooting pool to spaceflight, provides an entirely adequate description. An important part of learning relativity or quantum mechanics lies in understanding how they fit in with Newtonian physics - in fact, precisely how the paradigms are commensurable where their domains overlap. The same people at different times use the paradigm of Newton and the paradigms of Einstein and Bohr/Heisenberg. They don't use the paradigm of Aristotle or the New Age paradigm because - interesting though these are to the historian or the social scientist - they don't work; they are not fruitful for puzzle-solving, Kuhn would say.

A process of generalization of paradigms has been characteristic of physics for the past few centuries, and this seems true of mature sciences generally. At the fundamental level a paradigm that has proven really useful is hardly ever scrapped (Kuhn cites two cases from physics since Newton: the recurring controversy over the nature of light - both sides seem to have won that one - and the caloric theory of heat). Instead, the old paradigm is subsumed into a more developed theory with a broader domain of application, yielding in some sense deeper insights. Kuhn the physicist knew this, of course, though some of his readers don't; so he had to defend the unusual position that e.g. Newtonian mechanics is fundamentally incompatible with Einsteinian mechanics, even though one is a limiting case of the other (Kuhn disputed this) and both are used successfully all the time. This was the only way he could maintain that they are 'incommensurable'.

Where does this leave the incommensurability of paradigms? The concept can be interpreted according to taste along a spectrum: at one end, true but trivial; at the other end, deep but almost certainly false. Indeed - and I'm going to be shockingly naive here - you wouldn't be reading this otherwise; you'd be chipping flints. For what it's worth, my opinion is that Newton, far from 'living in a different world', would be perfectly at home with modern physics and raring to go, given a couple of years to get up to speed; Archimedes might take a little longer, while Aristotle would be a leading light at the Sorbonne.

More problematic even than incommensurability of paradigms in Kuhn's work are occasional gnomic statements such as the following:

"There is, I think, no theory-independent way to reconstruct phrases like 'really there'; the notion of a match between the ontology of a theory and its 'real' counterpart in nature now seems to me illusive in principle"

and

"Scientific knowledge, *like language*, is intrinsically the common property of a group *or else nothing at all*" (my italics).

Taken with the thesis of the book (though Kuhn denied it) remarks like these open the door to all the baggage of so-called radical relativism. Now the baggage is in the hall and halfway up the stairs, as Gross & Levitt, Sokal & Bricmont and others have pointed out. Some of us wish it was out back in the hen-house.

At the heart of modern physics there is indeed an incommensurability, in at least one of Kuhn's senses. It is between the two fundamental theories, general relativity and quantum mechanics. That doesn't stop people from using both paradigms, but it's a great puzzle: no one knows how to fit them together correctly. When we find out (strictly speaking I should say 'if'), it will be as a result of a paradigm that hasn't shifted since the seventeenth century: theoretical structure expressed in the language of mathematics, built on and feeding back into an empirical base. And there will be real, at present unimagined consequences.

You may say that's naive or begs the ontological question. But I say it's the best we've got. No amount of self-regarding talk about hermeneutics and postmodern science - though it comes with a reference list as long as your arm to all the stars of critical 'theory' - will advance our understanding one iota. Whatever the world is, it isn't like that, and Kuhn never really imagined it was.

In spite of the impression I may have given, the book is worth reading and it isn't difficult (some background knowledge of actual science would help). Read it for yourself; don't believe everything people say about it.

Note added: Some readers think that Kuhn was describing a process of successive approximation to truth, incorporating a smart new account of convergence. The point cannot be made too strongly that he was doing nothing of the sort. I recommend reading page 206 from which the remarks about 'really there' were quoted. You don't have to be a relativist and anti-realist to be a Kuhnian, but it helps.
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Showing 1-9 of 9 posts in this discussion
Initial post: Mar 31, 2008 10:24:10 AM PDT
Alan Meyer says:
One never knows what one will read in an Amazon book review. Sometimes it's just "This was my favorite book" or "What a dog!" Sometimes it's a useful description, giving us an annotated table of contents. Sometimes it's a piece of strikingly insightful literary criticism. But in my wide perusing of Amazon I can't recall reading such an interesting philosophical critique before.

Although it has been almost 40 years since I read Kuhn, I accepted his account (all the rage at that time) and internalized it pretty well. It's nice to have those old ideas of mine dredged up and knocked about a little, blowing the dust off, cracking open the seals, and shining some fresh light inside.

Well, Suetonius, thank you for this little gem.

Posted on Dec 31, 2008 10:16:57 AM PST
mostserene1 says:
This is a superb, penetrating review. Thank you.

Posted on Jan 9, 2009 10:58:37 AM PST
RiverBrat says:
I appreciate this review on many levels; one of my favorite phrases is that we don't know what we don't know. To take that further, once we figure out what we don't know, we can start to learn it and that can irrevocably change how we view and interact with the world around us. But we have to question the unquesionable in order to allow growth and change to take place. I'm really looking forward to reading this book alongside a second reading of Wilson's "Consilience." Thank you!

Posted on Feb 12, 2010 6:30:37 PM PST
Just wanted to add my kudos to the other three comments. This was a really outstanding review and its nice to see people actually putting in thought and (gasp) reading the books they write on. Keep up the good work!

Posted on May 30, 2010 10:51:59 AM PDT
wonderful!
clear!
inteligent!
unusually wise!

Posted on May 30, 2011 1:44:53 AM PDT
http://plato.stanford.edu/entries/incommensurability/

Posted on May 30, 2011 2:43:25 AM PDT
Last edited by the author on May 31, 2011 11:30:41 PM PDT
I think you've missed the point, slightly. Kuhn doesn't suggest that Newton COUDN'T have understood QM, just that the paradigm shift has resulted in all his terms being fundamentally redefined or, depending on how you look at it, bent out of shape. (ie. the words have undergone what linguists call semantic shift) Newton could have understood it, provided he was willing and able to, subtly or dramatically, revise all the culturally-inspired definitions used in his account of mechanics and visualize the brand new resultant worldview as a gestalt. The great sorcerer, alchemist and Lucasian Professor couldn't have understood it as is, without dragging his entire system of thought, the contextual environment he had set up to do his thinking after years of effort, through a thorough and drastic overhaul. Just as, eg, we don't readily grasp Aristotle's plant "motion" as plant growth since we do not conceptually place it within the same category of phenomena as human locomotion, though being a historically antecedent notion, this may be easier for us than the task in store for Newton.

As for Aristotle, he may have been more interested in becoming absorbed in some kind of intellectual ataraxy than getting his hands dirty in experiments. Not that he couldn't have understood science, but would he have wanted to? If you think so, for what? Do you honestly believe a proponent of eudaimonia would've been ecstatic about stepping off his intellectual pedestal into the pigsty of experimental science and the petty, endless politicking that is modern academic culture to further the holy cause of trading natural cleanliness for cheaper cheeseburgers? For some mysterious reason, most Americans I meet seem to assume that everyone ought to want the same things they do because of some kind of objective numinosity pervading the universe. We don't, and there isn't. See the above link for a brief and, IMO, accurate exposition of Kuhn's ideas.

Posted on May 30, 2011 2:15:34 PM PDT
BTW, here's a closer look at the paradigm shift in action: http://homepage.ntlworld.com/academ/whatswrongwithrelativity.html

Could Newton have understood (or chosen to understand) Relativity in its modern formulation? Your guess is as good as mine.

In reply to an earlier post on Nov 3, 2011 4:14:05 AM PDT
Ryan says:
Kuhn tends to be the philosopher of science for those in the humanities. Popper is the one who is most likely regarded as relevant to those actually doing science. Popper was interested in predictive value and falsifiability. Once a person understands that, it becomes clear why engineers are willing to use Newtonian models for some things and relativistic models for others.

A person looking at the meaning of words may very well see a semantic shift. But the notion of semantic shifts doesn't really help us understand why scientists are willing to use less precise but simpler models. Popper's model does.
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