Results 141 to 150 of about 402 (174)
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An improvement on the discrepancy in the implementation of modus ponens
Information Sciences, 1996zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Seok Yoon Hwang +2 more
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Journal of Philosophy, 2015
Is modus ponens for the indicative conditional valid? McGee [1985] famously presents several alleged ‘counterexamples’ to this rule of inference. More recently, Kolodny and MacFarlane [2010] and Willer [2010] argue that this rule is unreliable in some hypothetical contexts.
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Is modus ponens for the indicative conditional valid? McGee [1985] famously presents several alleged ‘counterexamples’ to this rule of inference. More recently, Kolodny and MacFarlane [2010] and Willer [2010] argue that this rule is unreliable in some hypothetical contexts.
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Modus Ponens, Modus Tollens, and Likeness
1998Modus Ponens (MP) and Modus Tollens (MT) are taught as basic rules of inference related to conditional statements in introductory logic courses. In ordinary reasoning, MP and MT can have important roles in modes of argumentation. However, one can also distinguish counter-examples to such reasoning patterns when considered as ‘strictly’ valid rules (i.e.
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2020
Questo articolo discute vari tentativi di esibire controesempi al modus ponens. In apertura, si chiarisce cosa significhi esibire un controesempio a un principio logico. Nel resto dell’articolo si considerano tre tipologie di attacco al modus ponens: (i) i controesempi di McGee la cui premessa maggiore consiste di condizionali iterati (ii) i ...
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Questo articolo discute vari tentativi di esibire controesempi al modus ponens. In apertura, si chiarisce cosa significhi esibire un controesempio a un principio logico. Nel resto dell’articolo si considerano tre tipologie di attacco al modus ponens: (i) i controesempi di McGee la cui premessa maggiore consiste di condizionali iterati (ii) i ...
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On a Generalization of the Modus Ponens: U-conditionality
2016In fuzzy logic, the Modus Ponens property for fuzzy implication functions is usually considered with respect to a continuous t-norm T and for this reason this property is also known under the name of T-conditionality. In this paper, the t-norm T is substituted by a uninorm U leading to the property of U-conditionality.
Margarita Mas +3 more
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The Journal of Philosophy, 2018
McGee (1985) argues that it is sometimes reasonable to accept both x and x->(y->z) without accepting y->z, and that modus ponens is therefore invalid for natural language indicative conditionals. Here, we examine McGee's counterexamples from a Bayesian perspective.
Reuben Stern, Stephan Hartmann
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McGee (1985) argues that it is sometimes reasonable to accept both x and x->(y->z) without accepting y->z, and that modus ponens is therefore invalid for natural language indicative conditionals. Here, we examine McGee's counterexamples from a Bayesian perspective.
Reuben Stern, Stephan Hartmann
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On weakening the Deduction Theorem and strengthening Modus Ponens
Mathematical Logic Quarterly, 2004AbstractThis paper studies, with techniques of Abstract Algebraic Logic, the effects of putting a bound on the cardinality of the set of side formulas in the Deduction Theorem, viewed as a Gentzen‐style rule, and of adding additional assumptions inside the formulas present in Modus Ponens, viewed as a Hilbert‐style rule.
Félix Bou +2 more
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On a Supposed Counterexample to Modus Ponens
The Journal of Philosophy, 1999Critique du pretendu contre-exemple que V. McGee oppose a la regle du ponens en affirmant que celle-ci s'applique aux propositions conditionnelles mais non a leurs consequences conditionnelles. Soulignant l'invalidite de la loi d'exportation sur laquelle s'appuie l'argumentation de McGee, l'A.
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Modus Ponens and Moral Realism
Ethics, 1988Moral realism holds that our moral judgments are "about the world" in much the way our other judgments are. Antirealists deny this, holding that in making moral judgments we are projecting our own attitudes onto things, or expressing these attitudes, or the like.
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Modus Ponens and Existence Updating
1998Classical logic attaches great importance to the ‘Law of Detachment’ or ‘modus ponens’ in connection with inferences (see, e.g., Kleene [57, p. 34] or Suppes [83, sect. 2.3]). This chapter deals therefore in some detail with such inferences as a special case of ‘generalized modus ponens updating’ defined in definition 13.3.1.
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