Online research in philosophy

We show that the contemporary debate surrounding the question “What is the norm of assertion?” presupposes what we call the quantitative view, i.e. the view that this question is best answered by determining how much epistemic support is required to warrant assertion. We consider what Jennifer Lackey ( 2010 ) has called cases of isolated second-hand knowledge and show—beyond what Lackey has suggested herself—that these cases are best understood as ones where a certain type of understanding , rather than knowledge, constitutes the required epistemic credential to warrant assertion. If we are right that understanding (and not just knowledge) is the epistemic norm for a restricted class of assertions, then this straightforwardly undercuts not only the widely supposed quantitative view, but also a more general presupposition concerning the universalisability of some norm governing assertion—the presumption (almost entirely unchallenged since Williamson’s 1996 paper) that any epistemic norm that governs some assertions should govern assertions—as a class of speech act—uniformly.

The basic linguistic phenomenon of presupposition is commonplace and intuitive, little different from the relation described by the word presuppose in its everyday usage. In ordinary language, when we say that someone presupposes something, we mean that they assume it, or take it for granted. The term is used in the same way when we talk of a speaker presupposing something, although typically we are interested in those assumptions which are revealed by what the speaker says. To begin with the most venerable case of presupposing, first discussed by Frege 1892, when a speaker makes an assertion, “there is always an obvious presupposition that the simple or compound proper names used have reference.” So a speaker who says.

The phenomenon we now know as projection was first observed by Frege in his brief remarks about presupposition in “Sense and Reference.” Frege observes there that the assertion that Kepler died in misery gives rise to the implication that the name Kepler has a referent; but that so too does the assertion that Kepler did not die in misery. Here we have the source of the observation that if p is a presupposition of S, then p is implied by (utterances of) S and by (utterances of) the negation of S. Since Frege, it has been observed that those implications which are shared by a sentence S and by its negation are also typically shared by a variety of other entailment-canceling embeddings of S: in questions, in the antecedents of conditionals, and under epistemic possibility modals. This observation has entered the canon in the form of the “family of sentences” test (Chierchia and McConnell-Ginet 2000). This test is 1 standardly used to demonstrate that some particular element of content projects. An application of the test is demonstrated below.

(i) There are things in themselves. (ii) We can have no knowledge of things in themselves. An obvious worry is that the denial of knowledge should undercut Kant’s own assertion that there are things in themselves.1 Thus Jacobi quips, referring to the thing in itself as a presupposition of Kant’s system: “without that presupposition I could not enter into the system, but with it I could not stay within” (1787, 336).

Hawthorne and Magidor's criticisms of the model of presupposition and assertion that I have used and defended are all based on a rejection of some transparency or introspection of assumptions about speaker presupposition. This response to those criticisms aims first to clarify, and then to defend, the required transparency assumptions. It is argued, first, that if the assumptions are properly understood, some prima facie problems for them do not apply, second, that rejecting the assumptions has intuitively implausible consequences, and third, that the 'margin of error' argument against the principle of positive introspection has a false premiss. The paper concludes with a response to a criticism of what Hawthorne and Magidor call 'the uniformity principle' that is used in the model to explain some pragmatic phenomena.

An operationalist argument criticized. Operationism maintains that the relation between a quantity and its operational criteria is established by definition. The assertion that the relation holds cannot be an empirical hypothesis; it is neither falsifiable nor confirmable, since it is not even testable. With an example concerning the measurement of time it is shown that this argument rests upon an untenable presupposition.

Recent semantic research has made increasing use of a principle, ‘Maximize Presupposition’, which requires that under certain circumstances the strongest possible presupposition be marked (Sauerland 2006). This principle is generally taken to be irreducible to standard (neo-) Gricean reasoning because, by definition, the forms that are in competition have the same assertive component (Percus 2006). We suggest, however that parts of Maximize Presupposition might be reducible to the theory of scalar implicatures. The analysis is a direct application of Stalnaker 2002: speech act participants are generally uncertain about what the Common Ground is; a speaker who asserts a sentence with presupposition p thereby indicates that he believes that it is common ground that p. If the addressee also believes that p, this suffices to make it common ground that p. Thus, even in the absence of any process of accommodation, more information is produced by a sentence S with presupposition p than with an alternative S’ that has the same assertive component but a weaker presupposition. If S and S’ form a scale, one should thus utter S rather than S’ whenever this is possible.

Presuppositions of utterances are the pieces of information you convey with an utterance no matter whether your utterance is true or not We rst study presupposition in a very simple framework of updating propo sitional information with examples of how presuppositions of complex propositional updates can be calculated Next we move on to presupposi tions and quanti cation in the context of a dynamic version of predicate logic suitably modi ed to allow for presupposition failure In both the propositional and the quanti cational case presupposition failure can be viewed as error abortion of procedures Thus a dynamic assertion logic which describes the preconditions for error abortion is the suitable tool for analysing presupposition..

Exponents and critics of semantic presupposition have almost invariably based their discussion on the ('Standard') definition of presupposition implied by Frege and Strawson. In this study Noel Burton-Roberts argues convincingly against this definition, that leads it to a three-valued semantics. He presents a very simple semantic definition which is weaker, more general and leads to a semantics more easily interpreted as two-valued with gaps. The author shows that a wide range of intuitive facts that eluded the Standard definition follow directly from this ('Revised') definition itself: facts about the presuppositions of compound sentences and modal sentences, about presuppositional conflict and about differences in the logical status of simple sentences suffering from presupposition failure. The book includes a detailed argument that an ambiguity of natural language negation, generally assumed to be necessary to the defence of semantic presupposition, is neither possible nor necessary in a presuppositional semantics. Noel Burton-Roberts has made an authoritative contribution to a debate which has involved philosophers and linguists for many years. His command of the issues, his clarity of exposition and his theoretical insight may well serve to change the boundaries of that debate.

This paper presents problems for Stalnaker’s common ground theory of presupposition. Stalnaker (Linguist and Philos 25:701–721, 2002) proposes a 2-stage process of utterance interpretation: presupposed content is added to the common ground prior to acceptance/rejection of the utterance as a whole. But this revision makes presupposition difficult to distinguish from assertion. A more fundamental problem is that the common ground theory rests on a faulty theory of assertion—that the essence of assertion is to present the content of an utterance as new information. Many examples are presented of utterances which are felicitous but not informative in this way.