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14. Science / B. Scientific Theories / 3. Instrumentalism

[scientific truth is just what works in our theories]

14 ideas
Pragmatism says all theories are instrumental - that is, mental modes of adaptation to reality [James]
     Full Idea: The pragmatist view is that all our theories are instrumental, are mental modes of adaptation to reality, rather than revelations or gnostic answers to some divinely instituted world enigma.
     From: William James (Pragmatism - eight lectures [1907], Lec 5)
     A reaction: This treats instrumentalism as the pragmatic idea of theories as what works (and nothing more), with, presumably, no interest in grasping something called 'reality'. Presumably instrumentalism might have other motivations - such as fun.
True thoughts are just valuable instruments of action [James]
     Full Idea: The possession of true thoughts means everywhere the possession of invaluable instruments of action.
     From: William James (Pragmatism - eight lectures [1907], Lec 6)
     A reaction: It looks to me like we should distinguish 'active' and 'passive' instrumentalism. The passive version says there is no more to theories and truth than what instruments record. James's active version says truth is an instrument for doing things well.
Special relativity, unlike general relativity, was operationalist in spirit [Putnam on Einstein]
     Full Idea: Einstein's interpretation of special relativity was operationalist in spirit (in marked contrast to the interpretation he gave to general relativity).
     From: comment on Albert Einstein (works [1915]) by Hilary Putnam - Reason, Truth and History Ch.5
     A reaction: The late twentieth century was polluted with daft relativism, and I hold Einstein partly responsible, suspecting that he was a bad philosopher. The later development of Einstein's view noted here is interesting.
All linguistic forms in science are merely judged by their efficiency as instruments [Carnap]
     Full Idea: The acceptance or rejection of abstract (or any other) linguistic forms in any branch of science will finally be decided by their efficiency as instruments.
     From: Rudolph Carnap (Empiricism, Semantics and Ontology [1950], 5)
The 'Tractatus' is instrumentalist about laws of nature [Wittgenstein, by Armstrong]
     Full Idea: Wittgenstein is an instrumentalist about laws of nature in 'Tractatus'.
     From: report of Ludwig Wittgenstein (Tractatus Logico-Philosophicus [1921]) by David M. Armstrong - What is a Law of Nature? 01.3
     A reaction: [I record this, but don't know the reference]
Users of digital thermometers recognise no temperatures in the gaps [Goodman]
     Full Idea: To use a digital thermometer with readings in tenths of a degree is to recognise no temperature as lying between 90 and 90.1 degrees.
     From: Nelson Goodman (Ways of Worldmaking [1978], 1.4d)
     A reaction: This appears to be nonsense, treating users of digital thermometers as if they were stupid. No one thinks temperatures go up and down in quantum leaps. We all know there is a gap between instrument and world. (Very American, I'm thinking!)
For Quine, theories are instruments used to make predictions about observations [Quine, by O'Grady]
     Full Idea: Quine's epistemological position is instrumentalist. Our theories are instruments we use to make predictions about observations.
     From: report of Willard Quine (works [1961]) by Paul O'Grady - Relativism Ch.3
     A reaction: This is the pragmatist in Quine. It fits the evolutionary view to think that the bottom line is prediction. My theory about the Pelopponesian War seems an exception.
For the instrumentalists there are no scientific explanations [Salmon]
     Full Idea: There is a centuries-old philosophical tradition, sometimes referred to by the name of 'instrumentalism', that has denied the claim that science has explanatory power. For the instrumentalists there are no scientific explanations.
     From: Wesley Salmon (Four Decades of Scientific Explanation [1989], 4.3)
     A reaction: [He quotes Coffa] Presumably it is just a matter of matching the world to the readings on the instruments, aiming at van Fraassen's 'empirical adequacy'. If there are no scientific explanations, does that mean that there are no explanations at all? Daft!
Naïve operationalism would have meanings change every time the tests change [Putnam]
     Full Idea: On a naïve operationalist account every time a new way of testing whether a substance is really gold is discovered, the meaning and reference of 'gold' undergoes a change.
     From: Hilary Putnam (Reason, Truth and History [1981], Ch.2)
Instrumentalism normally says some discourse is useful, but not genuinely true [Horgan,T]
     Full Idea: Instrumentalist views typically attribute utility to the given body of discourse, but deny that it expresses genuine truths.
     From: Terence Horgan (From Supervenience to Superdupervenience [1993], §8)
     A reaction: To me it is obvious to ask why anything could have a high level of utility (especially in accounts of the external physical world) without being true. Falsehoods may sometimes (though I doubt it) be handy in human life, but useful in chemistry…?
Operationalism defines concepts by our ways of measuring them [Mares]
     Full Idea: The central claim of Percy Bridgman's theory of operational definitions (1920s), is that definitions of certain scientific concepts are given by the ways that we have to measure them. For example, a straight line is 'the path of a light ray'.
     From: Edwin D. Mares (A Priori [2011], 02.9)
     A reaction: It is often observed that this captures the spirit of Special Relativity.
Instrumentalists regard theories as tools for prediction, with truth being irrelevant [Bird]
     Full Idea: Instrumentalism is so called because it regards theories not as attempts to describe or explain the world, but as instruments for making predictions; for the instrumentalist, asking about the truth of a theory is a conceptual mistake.
     From: Alexander Bird (Philosophy of Science [1998], Ch.4)
     A reaction: It cannot be denied that theories are used to make predictions, and there is nothing wrong with being solely interested in predictions. I cannot make head or tail of the idea that truth is irrelevant. Why is a given theory so successful?
For most scientists their concepts are not just useful, but are meant to be true and accurate [Gorham]
     Full Idea: The main difficulty with instrumentalism is its implausible account ot the meaning of theoretical claims and concepts. Most scientists take them to be straightforward attempts to describe the world. Most say they are useful because they are accurate.
     From: Geoffrey Gorham (Philosophy of Science [2009], 4)
     A reaction: Instrumentalism is seen as a Pragmatist view, and Dewey is cited.
Theories aren't just for organising present experience if they concern the past or future [Gorham]
     Full Idea: The strangeness of interpreting theories as mere tools for organising present experience is brought out clearly in sciences like cosmology and paleontology, which largely concern events in the remote past or future.
     From: Geoffrey Gorham (Philosophy of Science [2009], 4)
     A reaction: Not conclusive. An anti-realist has to interpret those sciences in terms of the current observations that are available.