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One ought to be logically consistent. This is sometimes referred to as the Normativity Thesis about logic. But why do we acknowledge it? This is the “source question”. This paper shows that Frege provided a promising, yet often ignored, answer to that question. Frege held that the logical consequence relation |= is not intrinsically normative. Rather, the normativity of logic is derived from something other than logic itself, namely the norm that one ought to judge truly and not falsely. I (...) |
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In this article, I analyze the evolution of Husserl's view on the normativity of logic and the corresponding changes in his phenomenological analysis of judgment. Initially, in the Prolegomena, Husserl claimed that the laws of pure logic are ideal and acquire normative status only as a result of application. Later, however, he revised this position and claimed that the same laws are at once ideal and normative. Sections 1 and 2 present textual evidence for attributing such a change of position (...) |
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Logic is widely held to be a normative discipline. Various claims have been offered in support of this view, but they all revolve around the idea that logic is concerned with how one ought to reason. I argue that most of these claims—while perhaps correct—only entail that logic is normative in a way that many, if not all, intellectual disciplines are normative. I also identify some claims whose correctness would make logic normative in a way that sets it apart from (...) |
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According to the Explanatory Problem with Frege's Platonism about Thoughts, the sharp separation between the psychological and the logical on which Frege famously insists is too sharp, leaving Frege no resources to show how it could be legitimate to invoke logical laws in an explanation of our activities of thinking. I argue that there is room in Frege's philosophy for such justificatory explanations. To see how, we need first to understand correctly the lesson of Frege's attack on psychologism as fundamentally (...) |
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According to the form of logical pluralism elaborated by Beall and Restall there is more than one relation of logical consequence. Since they take the relation of logical consequence to reside at the very heart of a logical system, different relations of logical consequence yield different logics. In this paper, we are especially interested in understanding what are the consequences of endorsing Beall and Restall’s version of logical pluralism vis-à-vis the normative guidance that logic is taken to provide to reasoners. (...) |
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