Reducing mental to physical states

If mental entities or, better, mental states should exist—and I myself do not doubt that the do exist—then positing mental states is necessary for any true explanation of them; and shoud they one day be reduced to physical states, then this will be a tremendous success. [293]

Provoking the ‘belief philosophers’

In upholding an objective third world [World 3] I hope to provoke those whom I call ‘belief philosophers’: those who, like Descartes, Locke, Berkeley, Hume, Kant, or Russell, are interested in our subjective beliefs, and their basis or origin. Against these belief philosophers I urge that our problem is to find better and bolder theories; and that critical pre­ference counts, but not belief. [107]

Nonsensical common sense

The commonsense theory of knowledge (which I have also dubbed ‘the bucket theory of the mind’) is the theory most famous in the form of the assertion that ‘there is nothing in our intellect which has not entered it through the senses’. (I have tried to show that this view was first formulated by Parmenides—in a satirical vein: Most mortals have nothing in their erring intellect unless it got there through their erring senses.) [3]

The subjectivist blunder of common-sense knowledge

I am a great admirer of common sense which, I assert, is essentially selfcritical. But while I am prepared to uphold to the last the essential truth of commonsense realism, I regard the commonsense theory of knowledge as a subjectivist blunder. This blunder has dominated Western philosophy. I have made an attempt to eradicate it, and to replace it by an objective theory of essentially conjectural knowledge. [Preface]

Nothing can be proved

The critical attitude, the tradition of free discussion of theories with the aim of discovering their weak spots so that they may be improved upon, is the attitude of reasonableness, of rationality. It makes far-reaching use of both verbal argu­ment and observation—of observation in the interest of argument, however. The Greeks’ discovery of the critical method gave rise at first to the mistaken hope that it would lead to the solution of all the great old problems; that it would establish certainty; that it would help to prove our theories, to justify them. But this hope was a residue of the dogmatic way of thinking; in fact nothing can be justified or proved (outside of mathematics and logic). The demand for rational proofs in science indicates a failure to keep distinct the broad realm of rationality and the narrow realm of rational certainty: it is an untenable, an unreasonable demand. [67]

Absolutely authoritarianism-free absolutism

The idea of a philosophical absolutism is rightly repugnant to many people since it is, as a rule, combined with a dog­matic and authoritarian claim to possess the truth, or a criterion of truth.

But there is another form of absolutism—a fallibilistic absolutism—which indeed rejects all this: it merely asserts that our mistakes, at least, are absolute mistakes, in the sense that if a theory deviates from the truth, it is simply false, even if the mistake made was less glaring than that in another theory. Thus the notions of truth, and of falling short of the truth, can represent absolute standards for the fallibilist. This kind of absolutism is completely free from any taint of authori­tarianism. [Addenda, 567-8]

One truth for the Greeks

Herodotus seems to have been one of those somewhat rare people whose minds are broadened by travel. At first he was no doubt shocked by the many strange customs and institutions which he encountered in the Middle East. But he learned to respect them, and to look on some of them critically, and to regard others as the results of historical accidents: he learned to be tolerant, and he even acquired the ability to see the customs and institutions of his own country through the eyes of his barbarian hosts.

This is a healthy attitude. But it may lead to relativism, that is, to the view that there is no absolute or objective truth, but rather one truth for the Greeks, another for the Egyptians, still another for the Syrians, and so on. [45]

Truth is above human authority

If only we look for it we can often find a true idea, worthy of being preserved, in a philosophical theory which must be rejected as false. Can we find an idea like this in one of the theories of the ultimate sources of our knowledge?

I believe we can; and I suggest that it is one of the two main ideas which underlie the doctrine that the source of all our knowledge is super-natural. The first of these ideas is false, I believe, while the second is true.

The first, the false idea, is that we must justify our knowledge, or our theories, by positive reasons, that is, by reasons capable of establishing them, or at least of making them highly probable; at any rate, by better reasons than that they have so far withstood criticism. This idea implies, I suggested, that we must appeal to some ultimate or authoritative source of true knowledge; which still leaves open the character of that authority–whether it is human, like observation or reason, or super-human (and therefore supernatural).

The second idea—whose vital importance has been stressed by Russell—is that no man’s authority can establish truth by decree; that we should submit to truth; that truth is above human authority.

Taken together these two ideas almost immediately yield the conclusion that the sources from which our knowledge derives must be super-human; a conclusion which tends to encourage self-righteousness and the use of force against those who refuse to see the divine truth.

Some who rightly reject this conclusion do not, unhappily, reject the first idea—the belief in the existence of ultimate sources of knowledge. Instead they reject the second idea—the thesis that truth is above human authority. They thereby endanger the idea of the objectivity of knowledge, and of common standards of criticism or rationality. [38-9]

What argument can do

No argument can force us to accept the truth of any belief. But a valid deductive argument can force us to choose be­tween the truth of its conclusion on the one hand and the falsity of its premises on the other. [10]

The production of unanimity

Adaptation to the power of progress furthers the progress of power, constantly renewing the degenerations which prove successful progress, not failed progress, to be its own antithesis. The curse of irresistible progress is irresistible regres­sion.

This regression is not confined to the experience of the sensuous world, an experience tied to physical proximity, but also affects the auto cratic intellect, which detaches itself from sensuous experience in order to subjugate it. The stan­dardization of the intellectual function through which the mastery of the senses is accomplished, the acquiescence of thought to the production of unanimity, implies an impoverishment of thought no less than of experience; the separation of the two realms leaves both damaged. [28]

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