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Knowledge and justification


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The Argument from Authority


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"Aristotle said X, therefore X is true." How valid is this argument? This argument is known as the argument from authority, and it is generally agreed among philosophers that it is not valid. The mention of Aristotle here might make this seem obvious; but there was a time in the history of ideas when practically everything that Aristotle wrote was taken as true, and it was dangerous to say that it wasn't. However, it is surprising to discover that most of what one believes is also based on some authority or other – for example, what we study in schools is what is written in textbooks. We hardly ever reconsider anything afresh. It is part of the environment of Western philosophy, at least as handed down from Descartes, that each philosopher should reconsider everything afresh and from first principles. Yet this too is disputed.
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

Related articles: (1) Introduction to Plato, (2) Knowledge and justification