Joanna Odrowąż-Sypniewska

Semantic contextualism claims that sentences ascribing knowledge or lack thereof (sentences like "S knows that p" and "S doesn't know that p") are context dependent: they express different propositions in different contexts of utterance. "Knows that" is either indexical or elliptical and refers to different relations in different circumstances. Invariantism argues in turn that the knowing relation is just one and the proposition expressed by a given knowledge ascription does not depend on context. A special case of invariantism is interest-relative invariantism proposed recently by Jason Stanley. According to |R| knowledge is conceptually linked to practical interests. Whether or not true beliefs count as knowledge depends on the costs of being wrong; on the stakes in a given situation (I may know that the bank will be open on Saturday if I have no important business to be done in the bank; if however I have an impending bill coming due I will not count as knowing that the bank will be open on Saturday even though my evidence as regard bank opening hours has not changed). It is argued in the paper that the difference between various contexts in which knowledge ascriptions are made is not a difference in stakes. Moreover knowledge has to be distinguished from willingness to be sure. One may know something but not be sure about it and may be sure about something but not to know it. The higher the stakes the more sure one usually wants to be, but the height of the stakes does not have such an impact on knowledge

In my paper I argue that a successful theory of vagueness should be able to account for faultless disagreement concerning borderline cases.Firstly, I claim that out of the traditional conceptions of vagueness the best equipped to account for faultless disagreement areparaconsistent solutions. One worry concerning dialetheism is that it seems to allow not only for faultless disagreements between different speakers, but also for such ‘disagreements’ between the given speaker and himself. Another worry, at least for some people, is that subvaluationism and dialetheism account for faultless disagreements by allowing contradictions. Next, I go on to argue that contextual conceptions, which are free from this latter worry, are equally well able to account for such disagreements. To this aim I offer a new account of the usage of personal taste predicates and suggest that we model the usage of all vague predicates on them. The idea is that in clear cases “a is F” means “a is F simpliciter”, whereas in borderline cases it means “a is F-to-me”. Since the boundary between borderline and nonborderline cases depends on context, my solution weds content-contextualism with truth-contextualism.

This paper is an attempt to show that the subvaluation theory isnot a good theory of vagueness. It begins with a short review of supervaluation and subvaluation theories and procedes to evaluate the subvaluation theory. Subvaluationism shares all the main short-comings of supervaluationism.Moreover, the solution to the sorites paradox proposed by subvaluationists isnot satisfactory. There is another solution which subvaluationists could availthemselves of, but it destroys the whole motivation for using a paraconsistentlogic and is not different from the one offered by supervaluationism.