Occasionally there has appeared in the history of philosophy a thinker who has become aware of the chaotic condition of philosophy and of the intellectual anarchy that exists in all of its branches, and has attempted to remedy the situation. Descartes cast about for a guiding principle, a compass which would show him the way through the treacherous terrain of philosophy. As is well known he devised the method of systematic doubt, by means of which he hoped to discover an axiom on which he could securely erect a system of basic and reassuring beliefs. Leibniz had before his mind the notion of an ideal language which would by calculation solve problems with certainty. With this he thought we “should be able to reason in metaphysics and morals in much the same way as in geometry and analysis.” Descartes' attempt was a failure; and nothing came of Leibniz's ideal, even with the development of modern symbolic logic. Russell's claim that “logic is the essence of philosophy” frightened many philosophers and gave new hope to others; but his claim was as empty as the proverbial political promise. With G. E. Moore we have a further attempt to introduce sobriety and certainty into philosophy and to make fruitful research possible in it. He has made prominent a method for obtaining results in philosophy; and he has also formulated a philosophical platform, i.e., set out a list of Common-sense propositions which he says are known to be true by everyone, philosopher as well as non-philosopher, and are not, therefore, open to debate. The method, which he used extensively and with great skill, is the method of analysing concepts.

I believe that Moore's appeal to common sense has been misunder-stood both by his defenders and his critics. Besides the mistakes of the latter, there is one enormous howler which, in my opinion, the former have committed. This is to confuse or coalesce two quite distinct appeals which he made, namely the appeal to common sense and the appeal to ordinary language.

The object of this paper is to review and examine some of the things which G. E. Moore says about the nature of intrinsic value, about the sort of objects which possess it, and about the method of ascertaining the intrinsic values of things. Most of the discussion will be based on Principia Ethica (1903): for in that work Moore stated the substance of his ethical theories once and for all. He explicitly changed his mind later on a few specific issues, which will be noted when they arerelevant: and I shall argue in my fourth section that he also changed his mind in one matter without acknowledging that he was doing so. With those exceptions, it seems to me that his later writings differ from Principia chiefly by their style of presentation and by the introduction of some new distinctions, and I shall think myself justified, on most points, in treating them as an aid to amplifying or refining the position which Moore adopted in Principia.The other works to be referred to are Ethics (1912); “The conception of intrinsic value”, written about 40 years ago and published in Philosophical Studies; “Is goodness a quality?” in Arist. Soc. Sup. Vol. 1932; and “A reply to my critics” in The Philosophy of G. E. Moore, edited by Schilpp (1942). The last work will be cited as Reply.

A newcomer to the writing of this survey quickly learns (though not quite quickly enough for his first venture) that they do not serve who only sit and wait. The expectation, in other words, that the year's major books of French philosophy will arrive unsolicited, is not fulfilled. Instead one is faced with a miscellaneous set of publications covering such varied topics as Jewish mysticism, cybernetics and a translation from Spanish of a primer of political economy. I must therefore beg readers to be indulgent enough to pay for my first lesson, promising them that henceforth I shall bestir myself and forage.

Professors A. D. Ritchie (Philosophy, January 1957) and F. H. George (Philosophy, April 1957) both miss the question: What is the use of saying that machines think? Does the extension in the use of the word “think” to cover the complicated activity of modern machines (actual or possible in theory) enable us to explain better the nature of such activity? Extensions in usage are common and necessary in science.