Online research in philosophy

According to the knowledge account of assertion, an assertion that p is correct just in case the speaker knows that p. This is so because of a norm that governs assertion and uniquely characterizes it. Recent opposition to the knowledge account accepts that assertion is governed by a norm, but proposes alternatives to the knowledge norm. In this paper I focus on some difficulties for normative accounts of assertion.

The Knowledge Account of Assertion (KAA) has received added support recently from data on prompting assertion (Turri 2010) and from a refinement suggesting that assertions ought to express knowledge (Turri 2011). This paper adds another argument from parenthetical positioning, and then argues that KAA’s unified explanation of some of the earliest data adduced in its favor recommends KAA over its rivals.

According to the increasingly popular knowledge account, assertion is governed by the rule that speech acts of that kind require knowledge of their content. Timothy Williamson has argued that this knowledge rule is the constitutive rule of assertion. It is argued here that it is not the constitutive rule of assertion in any sense of the term, as it governs only some assertions rather than all of them. A (qualified) knowledge rule can in fact be derived from the traditional analysis of assertion according to which assertion is the linguistic expression of belief. Because it is more informative, this analysis provides a better point of departure for defending the knowledge account than Williamson’s view according to which the knowledge rule is part of the analysis of assertion.

Many philosophers favour the simple knowledge account of assertion, which says you may assert something only if you know it. The simple account is true but importantly incomplete. I defend a more informative thesis, namely, that you may assert something only if your assertion expresses knowledge. I call this 'the express knowledge account of assertion', which I argue better handles a wider range of cases while at the same time explaining the simple knowledge account's appeal. §1 introduces some new data that a knowledge account of assertion well explains. §2 explains the simple knowledge account's advantage over two of its main competitors. §3 presents a problem for the simple account and offers a solution, which is to adopt the express knowledge account. §4 encapsulates the case for the express knowledge account, and offers a unifying vision for the epistemology of belief and assertion. §5 answers an objection. §6 briefly sums up. Even those who ultimately reject my conclusion can still benefit from the new data presented in §1, and learn an important lesson from the problem discussed in §3, which demonstrates a general constraint on an acceptable account of the norm of assertion.

I am currently examining the suggestion that assertion and practical reasoning are subject to specifically epistemic norms, and the consequences of this suggestion for the correct account of knowledge. One currently popular view is that knowledge is the epistemic norm of both assertion and practical reasoning (see DeRose, Hawthorne, Stanley and Williamson). If assertion and practical reasoning are governed by the knowledge norm, then one criterion for an account of knowledge is that it should respect the ties between knowledge, assertion and practical reasoning. In this way, the knowledge norm is at the heart of contemporary debate about the correct account of knowledge, e.g. the debate between contextualism and invariantism (see Hawthorne.

This paper argues that Epistemic Contextualism, Knowledge Closure, and the Knowledge Account of Assertion are inconsistent. The argument is developed by considering an objection to Contextualism that is unsuccessful. Some Contextualist responses are canvassed and rejected. Finally, it is argued that an analogue of the inconsistency arises for those who accept that justification is closed under known entailment.

This paper uses the knowledge account of assertion (KAA) in defense of epistemological contextualism. Part 1 explores the main problem afflicting contextualism, what I call the "Generality Objection." Part 2 presents and defends both KAA and a powerful new positive argument that it provides for contextualism. Part 3 uses KAA to answer the Generality Objection, and also casts other shadows over the prospects for anti-contextualism.

Contextualists offer "high-low standards" practical cases to show that a variety of knowledge standards are in play in different ordinary contexts. These cases show nothing of the sort, I maintain. However Keith DeRose gives an ingenious argument that standards for knowledge do go up in high-stakes cases. According to the knowledge account of assertion (Kn), only knowledge warrants assertion. Kn combined with the context sensitivity of assertability yields contextualism about knowledge. But is Kn correct? I offer a rival account of warranted assertion and argue that it beats Kn as a response to the "knowledge" version of Moore's Paradox.

This paper shows how to reconcile epistemic invariantism with the knowledge account of assertion. My basic proposal is that we can comfortably combine invariantism with the knowledge account of assertion by endorsing contextualism about speech acts. My demonstration takes place against the backdrop of recent contextualist attempts to usurp the knowledge account of assertion, most notably Keith DeRose’s influential argument that the knowledge account of assertion spells doom for invariantism and enables contextualism’s ascendancy. The paper’s plan: Section 1 explains contextualism and invariantism. Section 2 recounts a common influential objection to contextualism, to wit, that its proponents confuse warranted assertability with truth. Section 3 reviews DeRose’s response to this objection, wherein he argues that contextualism’s opponent, in leveling this objection, is hoist with his own petard. Sections 4 – 6 develop resources for crafting a version of invariantism that escapes DeRose’s argument. Section 7 introduces us to this freshly equipped version of invariantism, which can be wedded to the knowledge account of assertion. Sections 8 – 11 entertain and respond to objections. Section 12 concludes our discussion by suggesting how our new invariantist could respond to the radical skeptic, in a way that rivals the anti-skeptical contextualist’s response.

Keith DeRose has recently argued that the contextual variability of appropriate assertion, together with the knowledge account of assertion, yields a direct argument that ’knows’ is semantically contextsensitive. The argument fails because of an equivocation on the notion of warranted assertability. Once the equivocation is removed, it can be seen that the invariantist can retain the knowledge account of assertion and explain the contextual variability of appropriate assertion by appealing to Williamson’s suggestion that practical and conversational considerations can influence the extent to which adherence to the constitutive norm of assertion matters.