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2 " Certainly, what Kant calls the transcendental reference, experience and object of experience are in a sense present in both opposed views of the nature of the subjective *a-priori*. In both cases the object must 'order itself' according to the rules of the knowing mind or its functions, irrespective of whether the specific function of cognition is based on a systematic construction, synthetization, formation of the object from 'given' sensational material or on a methodical selection-process (suppression, abstraction, disregard) imposed on a self-constituting object. For if the order of selection in which the fulness of the world, as it is in ipseity, reaches man (or a particular kind of man, e.g., a type of racial or cultural unity) is so governed that an object of essence *B* is only given when an object of essence *A* has already been given (if, that is to say, *A* has datum-priority over *B* in order of time―not necessarily in direct succession), then if an object *X* is simultaneously of essence *A* and *B*, everything which is true of *A* must necessarily be true of *X*―not vice versa. For example, if spatiality and extensity have strict perceptual priority over all essential properties of matter and corporeality, geometry must be strictly valid for all possible bodies. But the same principle, the applicability of geometry to all bodies without exception, would still hold good if Kant's doctrine were true―though it denies the very reality of extension and space, and explains the spatial form as merely a subjective aspect of the datum. Thus in both cases the transcendental validity of the so-called *a-priori*, even for the objects of experience, would persist, so that in itself it offers us *no* criterion of choice between one or other *hypothesis*―that which supposes a synthetic addition of the form on the part of the spontaneous mind, or the other, which postulates an ordered selection in conformity with foreknown essences." ―from_On the Eternal in Man_. The Nature of Philosophy, with a new introduction by Graham McAleer "

17 " The difficulties connected with my criterion of demarcation (D) are important, but must not be exaggerated. It is vague, since it is a methodological rule, and since the demarcation between science and nonscience is vague. But it is more than sharp enough to make a distinction between many physical theories on the one hand, and metaphysical theories, such as psychoanalysis, or Marxism (in its present form), on the other. This is, of course, one of my main theses; and nobody who has not understood it can be said to have understood my theory.

The situation with Marxism is, incidentally, very different from that with psychoanalysis. Marxism was once a scientific theory: it predicted that capitalism would lead to increasing misery and, through a more or less mild revolution, to socialism; it predicted that this would happen first in the technically highest developed countries; and it predicted that the technical evolution of the 'means of production' would lead to social, political, and ideological developments, rather than the other way round.

But the (so-called) socialist revolution came first in one of the technically backward countries. And instead of the means of production producing a new ideology, it was Lenin's and Stalin's ideology that Russia must push forward with its industrialization ('Socialism is dictatorship of the proletariat plus electrification') which promoted the new development of the means of production.

Thus one might say that Marxism was once a science, but one which was refuted by some of the facts which happened to clash with its predictions (I have here mentioned just a few of these facts).

However, Marxism is no longer a science; for it broke the methodological rule that we must accept falsification, and it immunized itself against the most blatant refutations of its predictions. Ever since then, it can be described only as nonscience—as a metaphysical dream, if you like, married to a cruel reality.

Psychoanalysis is a very different case. It is an interesting psychological metaphysics (and no doubt there is some truth in it, as there is so often in metaphysical ideas), but it never was a science. There may be lots of people who are Freudian or Adlerian cases: Freud himself was clearly a Freudian case, and Adler an Adlerian case. But what prevents their theories from being scientific in the sense here described is, very simply, that they do not exclude any physically possible human behaviour. Whatever anybody may do is, in principle, explicable in Freudian or Adlerian terms. (Adler's break with Freud was more Adlerian than Freudian, but Freud never looked on it as a refutation of his theory.)

The point is very clear. Neither Freud nor Adler excludes any particular person's acting in any particular way, whatever the outward circumstances. Whether a man sacrificed his life to rescue a drowning, child (a case of sublimation) or whether he murdered the child by drowning him (a case of repression) could not possibly be predicted or excluded by Freud's theory; the theory was compatible with everything that could happen—even without any special immunization treatment.

Thus while Marxism became non-scientific by its adoption of an immunizing strategy, psychoanalysis was immune to start with, and remained so. In contrast, most physical theories are pretty free of immunizing tactics and highly falsifiable to start with. As a rule, they exclude an infinity of conceivable possibilities. "

Karl Popper

18 " Why not say that the meaning and purpose of the sexual powers is pleasure? Certainly sex is pleasurable, but there is nothing distinctive about that. In various ways and degrees, the exercise of every voluntary power is pleasurable. It is pleasurable to eat, pleasurable to breath, even pleasurable to flex the muscles of the leg. The problem is that eating is pleasurable even if I am eating too much, breathing is pleasurable even if I am sniffing glue, flexing the muscles of the leg is pleasurable even if I am kicking the dog. For a criterion of when it is good to enjoy each pleasure, one must look beyond the fact that it is a pleasure. Consider an analogy between sex and eating. The purpose of eating is to take in nutrition, but eating is pleasurable, so suppose that we were to say that the purpose of eating is pleasure, too. Then it would seem that any way of eating that gives pleasure is good, whether it is suitable for nutrition or not. Certain ancient Romans are said to have thought this way. To prolong the pleasure of their feasts, they purged between courses. I hope it is not difficult to recognize that such behavior is disordered. The more general point I am trying to make is that although we find pleasure in exercising our sexual powers, pleasure is not their purpose; it only provides a motive for using these powers, and a dangerous one, too, which may at times conflict with their true purposes and steer us wrong. Besides, to think of pleasure as the purpose of intercourse is to treat our bodies merely as tools for sending agreeable sensations to our minds. They are of inestimably greater dignity than that, for they are part of what we are. "

J. Budziszewski , On the Meaning of Sex