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- Jason S. Baehr, A Priori and a Posteriori. Internet Encyclopedia of Philosophy.The terms "a priori" and "a posteriori" refer primarily to how or on what basis a proposition might be known. A proposition is knowable a priori if it is knowable independently of experience. A proposition is knowable a posteriori if it is knowable on the basis of experience. The a priori/a posteriori distinction is epistemological and should not be confused with the metaphysical distinction between the necessary and the contingent or the semantical or logical distinction between the analytic and the synthetic. Two aspects of the a priori/a posteriori distinction require clarification: the conception of experience on which the distinction turns; and the sense in which a priori knowledge is independent of such experience. The latter gives rise to important questions regarding the positive basis of a priori knowledge.In my reading list | Discuss this article | Edit | Categorize |My bibliography
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In this paper I will offer a novel understanding of a priori knowledge. My claim is that the sharp distinction that is usually made between a priori and a posteriori knowledge is groundless. It will be argued that a plausible understanding of a priori and a posteriori knowledge has to acknowledge that they are in a constant bootstrapping relationship. It is also crucial that we distinguish between a priori propositions that hold in the actual world and merely possible, non-actual a (...)
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| | Other links: ttahko.net | Scholar | More.. I present and defend a unified, non-reductive analysis of the a priori and a posteriori . It is a mistake to remove all epistemic conditions from the analysis of the a priori (as, for example, Alvin Goldman has recently suggested doing). We can keep epistemic conditions (like unrevisability) in the analysis as long as we insist that a priori and a posteriori justification admit of degrees. I recommend making the degree to which a belief’s justification is a priori or a (...)
This paper challenges the Kripkean interpretation of a posteriori necessities. It will be demonstrated, by an analysis of classic examples, that the modal content of supposed a posteriori necessities is more complicated than the Kripkean line suggests. We will see that further research is needed concerning the a priori principles underlying all a posteriori necessities. In the course of this analysis it will emerge that the modal content of a posteriori necessities can be best described in terms of a Finean (...)
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| | Other links: ttahko.net | Scholar | More.. Particularism renders the options for a sound moral epistemology few and the prospects dim. One leading approach treats basic knowledge of particular cases as derivable from an a priori moral principle and a posteriori knowledge of the contingent non-moral facts to which the principle applies. Particularists must forgo this approach because it requires principles. Yet a purely a posteriori moral epistemology is also implausible, especially when combined with particularism. Particularists such as Jonathan Dancy are thus led to the view that (...)
Saul Kripke famously argued that some truths are both contingent and knowable a priori. For instance, one who stipulatively introduces the term ‘one meter’ as a rigid designator for the length of a certain stick s at time t is said to be in a position to know a priori that if s exists at t then the length of s at t is one meter.1 Call this the meter proposition. Many are unmoved by this or by Kripke’s other examples. (...)
Millians sometimes claim that we can explain the fact that sentences like "If Hesperus exists, then Hesperus is Phosphorus" seem a posteriori to speakers in terms of the fact that utterances of sentences of this sort would typically pragmatically convey propositions which really are a posteriori. I argue that this kind of pragmatic explanation of the seeming a posterioricity of sentences of this sort fails. The main reason is that for every sentence like the above which (by Millian lights) is (...)
Knowledge a priori has an important role in rationalistic schools: it pre-establishes truth in order to justify a system of correlated ideas. Empiricism usually concerns knowledge a posteriori, for experience itself is what we have actually known. Peirce’s probabilistic approach to science was based on necessity in the long run but it has no clear place in the categorization of knowledge either as a priori or as a posteriori. This deficit should be overcome by introducing a new category — synthetic (...)
In this essay I discuss Fichte's changing understanding of the a priori/a posteriori distinction from the earliest writings on the Wissenschaftslehre to the System of Ethics. I argue that Fichte moves decisively away from the Kantian conception of the a priori, due to his development of the ideal/real distinction in his elaboration of the Wissenschaftslehre. Since Fichte's conception of apriority is not Kant's, we can only understand his claim that the System of Ethics can provide an answer a priori to (...)
Two-dimensional semantics aims to eliminate the puzzle of necessary a posteriori and contingent a priori truths. Recently many argue that even assuming two-dimensional semantics we are left with the puzzle of necessary and a posteriori propositions. Stephen Yablo (Pacific Philosophical Quarterly, 81, 98–122, 2000) and Penelope Mackie (Analysis, 62(3), 225–236, 2002) argue that a plausible sense of “knowing which” lets us know the object of such a proposition, and yet its necessity is “hidden” and thus a posteriori. This paper answers (...)
