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The is-ought gap is Hume’s claim that we can’t get an ‘ought’ from just ‘is’s. Prior (“The Autonomy of Ethics,” 1960) showed that its most straightforward formulation, a staple of introductory philosophy classes, fails. Many authors attempt to resurrect the claim by restricting its domain syntactically or by reformulating it in terms of models of deontic logic. Those attempts prove to be complex, incomplete, or incorrect. I provide a simple reformulation of the is-ought gap that closely fits Hume’s description of (...) |
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The inoffensive title of Section 1.4.7 of Hume’s Treatise of Human Nature, ‘Conclusion of this Book’, belies the convoluted treatment of scepticism contained within. It is notoriously difficult to decipher Hume’s considered response to scepticism in this section, or whether he even has one. In recent years, however, one line of interpretation has gained popularity in the literature. The ‘usefulness and agreeableness reading’ (henceforth U&A) interprets Hume as arguing in THN 1.4.7 that our beliefs and/or epistemic policies are justified via (...) |
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In lieu of an abstract, here is a brief excerpt of the content:'Is* and Ought' in Context: Maclntyre's Mistake1 Murray MacBeth (1)What drives Hume to the conclusion that morality must be understood in terms of, explained and justified by reference to, the place of the passions and desires in human life is his initial assumption that either morality is the work of reason or it is the work of the passions and his own apparently conclusive arguments that it cannot be (...) |
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Discussion on whether Hume's treatment of induction is descriptive or normative has usually centred on Hume's negative argument, somewhat neglecting the positive argument. In this paper, I will buck this trend, focusing on the positive argument. First, I argue that Hume's positive and negative arguments should be read as addressing the same issues . I then argue that Hume's positive argument in the Enquiry is normative in nature; drawing on his discussion of scepticism in Section 12 of the Enquiry, I (...) |
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As is well known, the Humean account of causal inference gives a central location to inference habits. Some of these habits one can discipline. Thus, one can so discipline oneself as to reason in accordance with the “rules by which to judge of causes and effects”, that is, one can discipline oneself to think scientifically, rather than, say, in accordance with the rules of prejudice, or of superstition. All such judgments, even those of science, are, however, upon the Humean account (...) |
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The formulation and proof of Hume’s Law and several related inference barrier theses. |
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My first paper on the Is/Ought issue. The young Arthur Prior endorsed the Autonomy of Ethics, in the form of Hume’s No-Ought-From-Is (NOFI) but the later Prior developed a seemingly devastating counter-argument. I defend Prior's earlier logical thesis (albeit in a modified form) against his later self. However it is important to distinguish between three versions of the Autonomy of Ethics: Ontological, Semantic and Ontological. Ontological Autonomy is the thesis that moral judgments, to be true, must answer to a realm (...) |
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In this paper, I examine three mutually inconsistent claims that are commonly attributed to Hume: all beliefs are involuntary; some beliefs are subject to normative appraisal; and that ‘Ought implies Can’. I examine the textual support for such ascription, and the options for dealing with the puzzle posed by their inconsistency. In what follows I will put forward some evidence that Hume maintains each of the three positions outlined above. I then examine what I call the ‘prior voluntary action’ solution. (...) |
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Unlike old soldiers, the rhetoric of the great neither dies nor fades away. And so Hume's celebrated ‘is-ought’ passage still provokes debate.Hume was worried about the relation between ought statements and those supporting them: between ‘tolerence brings peace’ or ‘is God's will’, and ‘so one ought to be tolerant’. He denies the deducibility of the latter from the former, as the ‘ought’ expresses ‘a new relation or affirmation’, ‘entirely different from the others’. And this is commonly taken as saying that (...) |
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In lieu of an abstract, here is a brief excerpt of the content:64. ON HUME'S IS-OUGHT THESIS The famous thesis of Hume about "is" and "ought" I take to be, as I believe it has generally been taken to be: (1) For any factual statement e and any ethical statement h, h is not deducible from e. My object in these brief notes is neither to defend nor to attack (1), but just to point out certain mistakes which have been (...) |
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In lieu of an abstract, here is a brief excerpt of the content:Hume Studies Volume 27, Number 1, April 2001, pp. 3-83 Moral Skepticism and Moral Naturalism in Hume's Treatise NICHOLAS L. STURGEON Section I I believe that David Hume's well-known remarks on is and ought in his Treatise of Human Nature (T 469-70)1 have been widely misunderstood, and that in consequence so has their relation to his apparent ethical naturalism and to his skepticism about the role of reason in (...) |
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Was Hume here claiming or implying that propositions about what men ought to do are radically different from purely factual propositions, and that they cannot ever be entailed by any purely factual propositions? No, despite Mr Hare, Professor Nowell-Smith, Professor Ayer, Miss Murdoch, Professor Flew, Mr Basson, and The Observer's Brief Guide to philosophy. |
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- Peter Railton1 Railton's remark is accurate; contemporary philosophers almost invariably suppose that morality is more vulnerable than empirical science to scepticism. Yet David Hume apparently embraces an inversion of this twentieth century orthodoxy.2 In book I of the Treatise, he claims that the understanding, when it reflects upon itself, "entirely subverts itself" (T 1. 4.7.7; SBN 267) while, in contrast, in book III he claims that our moral faculty, when reflecting upon itself, acquires "new force" (T 3.3.6.3; SBN 619). (...) |
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Moral conclusions cannot validly be inferred from nonmoral premises – this principle, commonly called “Hume’s law,” presents a conundrum. On one hand, it seems obviously true, and its truth is often simply taken for granted. On the other hand, an ingenious argument by A. N. Prior seems to refute it. My aim here is a resolution. I shall argue, first, that Hume’s law is ambiguous, admitting both a strong and a weak interpretation; second, that the strong interpretation is false, as (...) |
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One of the most persistent issues of contemporary moral theory is the possibility of inferring moral judgments from factual nonmoral judgments. Another way of stating this issue is to inquire into the possibility of inferring "ought-judgments" from "is-judgments." It is generally accepted that the first person to deny the possibility of this inference was David Hume. The denial is supposed to be articulated in the last paragraph of the section of A Treatise of Human Nature entitled "Moral Distinctions not derived (...) |
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First Published in 1980. Routledge is an imprint of Taylor & Francis, an informa company. |
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There are various ways of characterising Hume’s dictum that ‘you can’t get an ought from an is.’ Contributors to the literature directly addressing this question focus on logical characterisations of autonomy theses. Such theses maintain that certain logical relations do not obtain between ethical and non-ethical sentences, for instance that no non-ethical sentences logically entail an ethical sentence. I argue that this focus on logical autonomy is a mistake. The thesis so important to our metaethicists is not a logical thesis (...) |
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