Why is there such a gap between nonspeaking animals and speaking man, when there is no other such gap in nature?
Is it possible that a theory of man is nothing more nor less than a theory of the speaking creatures?Walker Percy
Hayek made a suggestion that was to be of great importance in the theory's [i.e. General Equilibrium Theory or 'GET'] subsequent history, that the same goods available at two different moments of time should be treated as distinct goods whose relations of exchange were to be examined, although they might, 'technically speaking,' be one and the same product.
Friedrich Hayek
Fifth Theory.—This is our theory, or that of our Law. ...The theory of man's perfectly free will is one of the fundamental principles of the Law of our teacher Moses, and of those who follow the Law. According to this principle man does what is in his power to do, by his nature, his choice, and his will; and his action is not due to any faculty created for the purpose. All species of irrational animals likewise move by their own free will. This is the Will of God; that is to say, it is due to the eternal divine will that all living beings should move freely, and that man should have the power to act according to his will or choice within the limits of his capacity.
Maimonides
Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory. On the other hand, you can disprove a theory by finding even a single observation that disagrees with the predictions of the theory. As philosopher of science Karl Popper has emphasized, a good theory is characterized by the fact that it makes a number of predictions that could in principle be disproved or falsified by observation. Each time new experiments are observed to agree with the predictions the theory survives, and our confidence in it is increased; but if ever a new observation is found to disagree, we have to abandon or modify the theory.
Stephen Hawking
"Castilian Spanish speaking Spain is big, but is bigger in addition with Catalonian speaking Spain, Galician speaking Spain and Basque speaking Spain. Democratic Spain, Constitutional Spain, can not be separated from diversity and the respect to the citizenship"
Jose Luis Rodriguez Zapatero
It is probable that when future historians of economic thought look back over this century, the thirties will appear as an era of rapid development in economic theory. Not only has there been unusual activity in monetary theory, theory of value. but extensive transformations have also been made in the basic theory of value. The outstanding publications in this field are, of course, Joan Robinson's Theory of Imperfect Competition and Chamberlin's Theory of Monopolistic Competition, the first produced in Cambridge, England, and the second in Cambridge, Massachusetts. These volumes mark the explicit recognition of the theory of the firm as an integral division of economic analysis upon which rests the whole fabric of equilibrium theory. General equilibrium is nothing more than the problem of the interaction of individual economic organisms, under various conditions and assumptions; as a necessary preliminary to its solution, an adequate theory of the individual organism itself is necessary.
Kenneth Boulding
Percy, Walker
Perelman, S. J.
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