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We construct a faithful interpretation of ukasiewicz's logic in product logic (both propositional and predicate). Using known facts it follows that the product predicate logic is not recursively axiomatizable.We prove a completeness theorem for product logic extended by a unary connective of Baaz [1]. We show that Gödel's logic is a sublogic of this extended product logic.We also prove NP-completeness of the set of propositional formulas satisfiable in product logic (resp. in Gödel's logic). 相似文献
254.
Libertarianism vs. Marxism: Reflections on G. A. Cohen‘s Self-Ownership, Freedom and Equality 总被引:1,自引:0,他引:1
Jan Narveson 《The Journal of Ethics》1998,2(1):1-26
Self-Ownership, Freedom and Equality is G.A. Cohens attempt to rescue something of the socialist outlook on society from the challenge of libertarianism, which Cohen identifies with the work of Robert Nozick in his famous book, Anarchy, State, and Utopia. Sympathizing with the leading idea that a person must belong to himself, and thus be unavailable for forced redistribution of his efforts, Cohen is at pains to reconcile the two. This cannot be done – they are flatly contrary. Moreover, equality is a nonsense principle, calling for such things as equal distribution of natural resources. But resources, as goods, are not natural: all require work to utilize. The only thing exchanged on markets is services, and estimates of value received are relevantly made only by those party to the exchanges in question. Imposition from above on voluntary exchange can only be socially counterproductive. 相似文献
255.
Jan Herman Brinks 《Heythrop Journal》1998,39(1):1-17
This article is a discussion of the instrumentalization of Martin Luther by German historiography in the nineteenth and twentieth centuries for politically-legitimating, purpose providing ('sinnstiftend') and especially national purposes. In the nineteenth century the Luther jubilee of 1883 was one of the highlights of German nationalism, which had developed rapidly since the unification of 1871. During the First and Second World War Luther again was turned into an active supporter of German nationalism. This study focuses on the last large-scale attempt to instrumentalize Luther for national purposes; ie the Luther interpretation in the German Democratic Republic. With the help of a new Luther reception the GDR tried to improve the basis for her own national identity. She intensified her policy of delimitation from the Federal Republic of Germany with the help of a new and very positive Luther image. These East German attempts, however, backfired and were counter productive in their results. The political appeal to an all-German historical personality like Martin Luther could not legitimate a divided Germany. On the contrary, it brought about the opposite, that is it rather stimulated underlying all-German affinities and cohesive forces. Of course East German historians did not aim at "Wiedervereinigung"– which, naturally was a political issue of the highest degree. But, with the aid of Luther, they unconsciously played an important part in setting the stage for German unification. 相似文献
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Frank Baeyens Jan De Houwer Deb Vansteenwegen Paul Eelen 《Learning and motivation》1998,29(4):461-474
Field and Davey (1997) claimed that evaluative conditioning (EC), rather than being a genuine type of Pavlovian associative learning, represents nothing but an experimental artifact. They come to this conclusion by first identifying the prototypical experimental procedure of EC research, by next pointing to the potential methodological shortcomings of this prototypical procedure in order to infer associative learning, and by finally demonstrating that when the appropriate controls are added to this prototypical procedure, it becomes clear that apparent EC results represent nothing but an experimental artifact. In this paper, we first demonstrate that what Field and Davey identify as the “prototypical procedure” is, as a matter of fact, the exception rather than the rule in EC research, such that the potential scope of their criticism is rather limited. Next, we show how the results of their own experiment are actually due to an artifact that is not present in any EC study. Finally, we discuss how Field and Davey's criticism of EC research has its roots in a misconception of the appropriate within or between subject controls for Pavlovian associative learning. 相似文献
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Gustav Jahoda Jan B. Deregowski Durganand Sinha 《International journal of psychology》1974,9(3):159-172
The question explored in this study is whether the spatial-perceptual difficulties experienced in some cultures could be partly accounted for in terms of a persistence of predominantly topological functioning. An oddity-choice task was devised consisting of one set of regular and another of irregular figures such that responses could be classified as topological (T), Euclidean (E) or “unrelated” (U), the last indicating failure to categorize figures consistently. A total of 415 children aged 4–12 were tested in Hong Kong, India, Scotland and Zambia. Few significant age trends but highly significant cultural and sub-cultural differences were found. Contrary to expectation, T responses were roughly constant while the proportion of both E and U responses showed systematic cross-cultural variations. There was evidence that it is U responses rather than the proportion of E responses which directly reflect spatial ability. The factors producing cultural and sub-cultural differences are discussed. 相似文献
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