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The Structure and Dynamics of Theories by Wolfgang Stegmüller (auth.)

By Wolfgang Stegmüller (auth.)

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By assigning to the individual terms in the axioms definite objects and to the property and relation predicates properties and relations, one obtains an interpretation of the axiom system. , if the assigned objects exhibit the properties and relations as described by the axioms, then we say that this system of things, properties, and relations represents a model of I:. In a model all theorems are then also true because the logical consequences of true statements must themselves be true. The expression "implicit definition" is often attributed to Hilbert himself.

In 'the fight against the concept of observability' one observes for example, how sometimes even prominent auth~rs struggle to set up a straw man and then have to resort to even greater exertions to keep from being knocked over by their own creations. By questioning the dual-level theory of scientific language in general we do appear to be headed for an unavoidable conflict with the arguments of Chapter 4 of Stegmiiller's [Theoretische Begriffe]. For even if one does not find all of the arguments there convincing, in toto they seem to urge the duallevel conception rather forcefully.

And indeed it does seem to be alien to both forms of scientific enterprise delineated by Kuhn. In normal science theories are not subjected to criticism at all. They are used as instruments in solving scientific puzzles. And in times of extraordinary research theories are sometimes cast aside, not, however, because they 'have failed the test of experience,' but because they are dislodged by other theories. ' Initially Kuhn set himself a quite unpretentious goal-namely, to show that traditional notions of scientific progress as a gradual growth process, an 'accumulation of knowledge,' are false and must be replaced by a different sort of description of scientific dynamics.

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