共查询到20条相似文献,搜索用时 15 毫秒
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Timothy Pawl 《Australasian journal of philosophy》2013,91(3):539-550
Call the thesis that, possibly, there are two times, t1 and t2, such that everything that exists at t2 also exists at t1, but some things that exist at t1 do not exist at t2 Temporal Change. Call the thesis that, possibly, there are two worlds, w and v, such that everything that exists at v also exists at w, but some things that exist at w do not exist at v Modal Difference. I argue that if either Temporal Change or Modal Difference is true, then Orthodox Truthmaker Theory—the theory that every truth requires a necessitating truthmaker—is false. 相似文献
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《Journal of Cognitive Psychology》2013,25(5):541-559
This article presents a model-based theory of what negation means, how it is mentally represented, and how it is understood. The theory postulates that negation takes a single argument that refers to a set of possibilities and returns the complement of that set. Individuals therefore tend to assign a small scope to negation in order to minimize the number of models of possibilities that they have to consider. Individuals untrained in logic do not know the possibilities corresponding to the negation of compound assertions formed with if, or, and and, and have to infer the possibilities one by one. It follows that negations are easier to understand, and to formulate, when individuals already have in mind the possibilities to be negated. The paper shows that the evidence, including the results of recent studies, corroborates the theory. 相似文献
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We study an application of gaggle theory to unary negative modal operators. First we treat negation as impossibility and get
a minimal logic system Ki that has a perp semantics. Dunn's kite of different negations can be dealt with in the extensions
of this basic logic Ki. Next we treat negation as “unnecessity” and use a characteristic semantics for different negations in a kite which is dual
to Dunn's original one. Ku is the minimal logic that has a characteristic semantics. We also show that Shramko's falsification logic FL can be incorporated into some extension of this basic logic Ku. Finally, we unite the two basic logics Ki and Ku together to get a negative modal logic K-, which is dual to the positive modal logic K+ in [7]. Shramko has suggested an extension of Dunn's kite and also a dual version in [12]. He also suggested combining them
into a “united” kite. We give a united semantics for this united kite of negations. 相似文献
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Dimiter Vakarelov 《Studia Logica》2006,84(1):105-127
The paper is devoted to the contributions of Helena Rasiowa to the theory of non-classical negation. The main results of Rasiowa in this area concerns–constructive logic with strong (Nelson) negation,–intuitionistic negation and some of its generalizations: minimal negation of Johansson and semi-negation.We discuss also the impact of Rasiowa works on the theory of non-classical negation.A lecture presented at the International Conference Trends in Logic III : A. Mostowski, H. Rasiowa and C. Rauszer in memoriam, Warsaw, Ruciane-Nida September 23-26, 2005. 相似文献
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This paper develops a semantical model – theoretic account of (logical) content complementing the syntactically specified account of content developed in A New Theory of Content I, JPL 23: 596–620, 1994. Proofs of Completeness are given for both propositional and quantificational languages (without identity). Means for handling a quantificational language with identity are also explored. Finally, this new notion of content is compared, in respect of both logical properties and philosophical applications, to alternative partitions of the standard consequence class relation proposed by Stelzner, Schurz and Wiengartner. 相似文献
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Wales and Grieve (1969) report an experiment in which they show that a factor of “confusability” affects the comprehension of affirmative and negative sentences, and then claim that this is a relevant factor in explaining the difficulty of negatives. The present paper submits arguments and experimental evidence to dispute this claim. 相似文献
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The case of the Unabomber is examined as a test of the authors' theory of negation, which is based on four steps: (1) negation, (2) persecutory ideation, (3) attachment to a transcendental source, and (4) evangelism/martyrdom. The Unabomber sent bombs that killed three persons and injured others, and became a cause celebre in the 1990s when he threatened to blow up an airliner in flight if his 36,000 word manifesto was not published in a leading periodical. Eventually captured and tried, he refused an insanity defense but accepted a sentence of life imprisonment without possibility of parole. The authors' theory is a phenomenological model which encourages an intensive analysis of observations of behavior, with the goal of abstracting dimensions that serve to integrate the observations, codify them, and bind them into a unitary system. 相似文献
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Norms and Negation: A Problem for Gibbard's Logic 总被引:1,自引:0,他引:1
Nicholas Unwin 《The Philosophical quarterly》2001,51(202):60-75
All expressivist theories, including Gibbard's norm-expressivism, require a solution to the 'Frege–Geach problem', or 'embedding problem'. This is the problem of accounting for the fact that normative predicates can enter into indefinitely many complex contexts without changing their meanings. I argue that Gibbard's well known solution fails. The chief difficulty is with negated contexts, specifically the distinction between refusing to accept a normative judgement and accepting its negation. Gibbard overlooks this distinction, and, more generally, overlooks the fact that norm-expressivists cannot explain what is meant by ruling out the content of a normative state, as opposed to ruling out its possession. I show this to have fundamental repercussions, and I cast serious doubt on the viability of expressivist theories of this type. 相似文献
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The conjunction fallacy occurs when people judge the conjunctive probability P(A ∧ B) to be greater than a constituent probability P(A), contrary to the norms of probability theory. This fallacy is a reliable, consistent and systematic part of people's probability judgements, attested in many studies over at least 40 years. For some events, these fallacies occur very frequently in people's judgements (at rates of 80% or more), while for other events, the fallacies are very rare (occurring at rates of 10% or less). This wide range of fallacy rates presents a challenge for current theories of the conjunction fallacy. We show how this wide range of observed fallacy rates can be explained by a simple model where people reason according to probability theory but are subject to random noise in the reasoning process. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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Misperception of Chance,Conjunction, Belief in the Paranormal and Reality Testing: A Reappraisal 下载免费PDF全文
Neil Dagnall Kenneth Drinkwater Andrew Parker Kevin Rowley 《Applied cognitive psychology》2014,28(5):711-719
The present study examined the degree to which specific probabilistic biases (misperception of chance and conjunction fallacy) were associated with belief in the paranormal and proneness to reality testing (RT) deficits. Participants completed measures assessing probabilistic reasoning, belief in the paranormal and RT. Perception of randomness predicted the level of paranormal belief and proneness to RT deficits. These results provide support for the notion that paranormal believers demonstrate greater misrepresentation of chance. With regard to conjunction, a framing effect occurred. Problems presented in a paranormal context correlated negatively with the level of paranormal belief and proneness to RT deficits. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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