Knowledge and justification
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The a priori
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Nonetheless, Russell's reaction illustrates the power of the objection that logical knowledge cannot be derived from experience. He states also that mathematical knowledge cannot be derived from experience. Russell explicitly rejects Plato's conclusion that innate ideas must imply pre-existence. He writes, "It would certainly be absurd to suppose that there are innate principles in the sense that babies are born with a knowledge of everything which men know and which cannot be deduced from what is experienced. For this reason, the word 'innate' would not now be employed to describe our knowledge of logical principles. The phrase 'a priori' is less objectionable, and is more usual in modern writers. Thus, while admitting that all knowledge is elicited and caused by experience, we shall nevertheless hold that some knowledge is a priori, in the sense that the experience which makes us think of it does not suffice to prove it, but merely so directs our attention that we see its truth without requiring any proof from experience." Thus the rationalists' strongest argument would appear to start with the claim that there exists a priori knowledge. This is knowledge that cannot be logically derived from sense-experience, and hence must have a source independently of experience. Rationalists then seek to explain where this knowledge comes from. Descartes says it is directly implanted into our minds by God; Plato says that it derives from our pre-existence; Russell, who is also a rationalist, says that it comes from a direct acquaintance with universals.
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Contents of Knowledge and justification
1 The distinction between knowledge and belief 2 Unsound, invalid, possible world and fallacy 3 Counterexample, exposing a fallacy 4 Belief and doubt 5 Believing that and knowing that 6 Knowledge and certainty - the tripartite definition of knowledge 7 True, justified belief 8 Plato: The Theaetetus 9 Plato: Forms 10 The possibility of scepticism and categories of belief 11 Global scepticism 12 The Argument from Authority 13 Valid argument, inference and justification 14 Chain of deductive inferences, self-evident truths 15 Sense experience, empiricism 16 The dialectic method, thesis and antithesis 17 Rationalism and empiricism; the Discourse on the Method 18 The Cogito, Reason and Rational Insight 19 Bertrand Russell, Acquaintance 20 Universals, Forms 21 Scepticism, Existentialism and Faith 22 The evil genius argument 23 Existentialism 24 Soren Kierkegaard - Fear and Trembling - the Absurd 25 Foundation for Knowledge 26 Theory of Knowledge, Epistemology and Metaphysics 27 Rationalism, Mathematics and Logic, Innateness 28 Innate Ideas 29 The a priori 30 Truth by convention, Hume and the Method of Doubt 31 Hume and the distinction between belief and knowledge 32 Hume and the definition of belief 33 Truth as a logical operator on sentences 34 The correspondence theory of truth 35 Wittgenstein: On Certainty 36 Wittgenstein and the coherence theory of truth 37 William James and Pragmatism 38 W.V.O. Quine, pragmatism and the Two Dogmas of Empiricism 39 Postivism and pragmatism 40 Pragmatism and utilitarianism 41 Pragmatism and religiion
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