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I was raised almost entirely on turnips and potatoes, but I think that the turnips had more to do with the effect than the potatoes. Marlene Dietrich		Saturday Aug 15, 2026
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In other words, the propositions of philosophy are not factual, but linguistic in character that is, they do not describe the behaviour of physical, or even mental, objects; they express definitions, or the formal consequences of definitions. Accordingly we may say that philosophy is a department of logic. For we will see that the characteristic mark of a purely logical enquiry, is that it is concerned with the formal consequences of our definitions and not with questions of empirical fact.

Alfred Jules Ayer

Quote Author: Alfred Jules Ayer

	Alfred Jules Ayer
	Language Truth and Logic, Ayer, Ch.4, p.108.

Other Alfred Jules Ayer Quotes

A point which is not sufficiently brought out by Russell, if indeed it is recognized by him at all, is that every logical proposition is valid in its own right. Its validity does not depend upon its being incorporated in a system, and deduced from certain

In other words, the propositions of philosophy are not factual, but linguistic in character that is, they do not describe the behaviour of physical, or even mental, objects; they express definitions, or the formal consequences of definitions. Accordingly we may say that philosophy is a department of logic. For we will see that the characteristic mark of a purely logical enquiry, is that it is concerned with the formal consequences of our definitions and not with questions of empirical fact.