Substance quotes

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Galileo

Milky Way

“The next object which I have observed is the essence or substance of the Milky Way. By the aid of a telescope anyone may behold this in a manner which so distinctly appeals to the senses that all the disputes which have tormented philosophers through so many ages are exploded at once by the irrefragable evidence of our eyes, and we are freed from wordy disputes upon this subject, for the Galaxy is nothing else but a mass of innumerable stars planted together in clusters.”
  • Source: Galileo Galilei, In the pamphlet, The Sidereal Messenger (1610), reprinted in The Sidereal Messenger of Galileo Galilei: And a Part of the Preface to the Preface to Kepler's Dioptrics Containing the Original Account of Galileo's Astronomical Discoveries (1880), 42.

Nicholas_Rescher

Inherent Unpredictability

“The inherent unpredictability of future scientific developments — the fact that no secure inference can be drawn from one state of science to another — has important implications for the issue of the limits of science. It means that present-day science cannot speak for future science: it is in principle impossible to make any secure inferences from the substance of science at one time about its substance at a significantly different time. The prospect of future scientific revolutions can never be precluded. We cannot say with unblinking confidence what sorts of resources and conceptions the science of the future will or will not use. Given that it is effectively impossible to predict the details of what future science will accomplish, it is no less impossible to predict in detail what future science will not accomplish. We can never confidently put this or that range of issues outside 'the limits of science', because we cannot discern the shape and substance of future science with sufficient clarity to be able to say with any assurance what it can and cannot do. Any attempt to set 'limits' to science — any advance specification of what science can and cannot do by way of handling problems and solving questions — is destined to come to grief.”
  • Source: Nicholas Rescher, The Limits of Science (1984), 102-3.

Herbert_Simon

Markets and Coordination

“Markets aim to coordinate the decisions and behavior of multitudes of economic actors to guarantee that the quantity of brussels sprouts shipped to market bears some reasonable relation to the quantity that consumers will buy and eat, and that the price at which brussels sprouts can be sold bears a reasonable relation to the cost of producing them. Any society that is not a subsistence economy, but has substantial specialization and division of labor, needs mechanisms to perform this coordinative function. Markets are only one, however, among the spectrum of mechanisms of coordination on which any society relies. [central planning, bargaining and negotiation, business, government, education, balloting procedures]”

Invisible Hand

“In examining the processes of social coordination, economics has given top billing sometimes almost exclusive billing to the market mechanism. It is indeed a remarkable mechanism... The optimality theorems stretch credibility, so far as real-world markets are concerned, because they require substantive rationality of the kinds we found implausible in our examination of the theory of the firm. Markets populated by consumers and producers who satisfice instead of optimizing do not meet the conditions on which the theorems rest.”