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Theory Quotes
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The philosopher of science is not much interested in the thought processes which lead to scientific discoveries; he looks for a logical analysis of the completed theory, including the establishing its validity. That is, he is not interested in the context of discovery, but in the context of justification (Theory Quotes)
We must alter theory to adapt it to nature, but not nature to adapt it to theory.? (Theory Quotes)
Poincaré was a vigorous opponent of the theory that all mathematics can be rewritten in terms of the most elementary notions of classical logic; something more than logic, he believed, makes mathematics what it is (Theory Quotes)
We may as well cut out group theory. That is a subject that will never be of any use in physics (Theory Quotes)
You didn’t see me on television, you didn’t see news stories about me. The kind of role that I tried to play was to pick up pieces or put together pieces out of which I hoped organization might come. My theory is, strong people don’t need strong leaders (Theory Quotes)
There is no foundation in geological facts, for the popular theory of the successive development of the animal and vegetable world, from the simplest to the most perfect forms (Theory Quotes)
That’s all well and good in practice, but how does it work in theory? (Theory Quotes)
When the province of physical theory was extended to encompass microscopic phenomena through the creation of quantum mechanics, the concept of consciousness came to the fore again. It was not possible to formulate the laws of quantum mechanics in a fully consistent way without reference to the consciousness (Theory Quotes)
Nothing is known in our profession by guess; and I do not believe, that from the first dawn of medical science to the present moment, a single correct idea has ever emanated from conjecture: it is right therefore, that those who are studying their profession should be aware that there is no short road to knowledge; and that observation on the diseased living, examination of the dead, and experiments upon living animals, are the only sources of true knowledge; and that inductions from these are the sole bases of legitimate theory (Theory Quotes)
The importance of group theory was emphasized very recently when some physicists using group theory predicted the existence of a particle that had never been observed before, and described the properties it should have. Later experiments proved that this particle really exists and has those properties (Theory Quotes)
Students using astrophysical textbooks remain essentially ignorant of even the existence of plasma concepts, despite the fact that some of them have been known for half a century. The conclusion is that astrophysics is too important to be left in the hands of astrophysicists who have gotten their main knowledge from these textbooks. Earthbound and space telescope data must be treated by scientists who are familiar with laboratory and magnetospheric physics and circuit theory, and of course with modern plasma theory (Theory Quotes)
The theory of the lung as a gland has justified its existence and done excellent service in bringing forward facts, which shall survive any theoretical construction that has been or may hereafter be put upon them (Theory Quotes)
The argument advanced by the supporters of the theory of hereditary transmission does not furnish a satisfactory explanation of the cause of the inequalities and diversities of the universe (Theory Quotes)
The fundamental laws of the universe which correspond to the two fundamental theorems of the mechanical theory of heat.1. The energy of the universe is constant.2. The entropy of the universe tends to a maximum (Theory Quotes)
What I most cherish is the observation of the movement of colors. Only in this have I found the laws of those simultaneous and complementary color contrasts that nourish the actual rhythm of my vision. In this I find the actual essence, an essence which is not born out of an a priori system or theory (Theory Quotes)
This is, in theory, still a free country, but our politically correct, censorious times are such that many of us tremble to give vent to perfectly acceptable views for fear of condemnation. Freedom of speech is thereby imperiled, big questions go undebated, and great lies become accepted, unequivocally as great truths (Theory Quotes)
... one of the main functions of an analogy or model is to suggest extensions of the theory by considering extensions of the analogy, since more is known about the analogy than is known about the subject matter of the theory itself... A collection of observable concepts in a purely formal hypothesis suggesting no analogy with anything would consequently not suggest either any directions for its own development (Theory Quotes)
Until now the theory of infinite series in general has been very badly grounded. One applies all the operations to infinite series as if they were finite; but is that permissible? I think not. Where is it demonstrated that one obtains the differential of an infinite series by taking the differential of each term? Nothing is easier than to give instances where this is not so (Theory Quotes)
For if as scientists we seek simplicity, then obviously we try the simplest surviving theory first, and retreat from it only when it proves false. Not this course, but any other, requires explanation. If you want to go somewhere quickly, and several alternate routes are equally likely to be open, no one asks why you take the shortest. The simplest theory is to be chosen not because it is the most likely to be true but because it is scientifically the most rewarding among equally likely alternatives. We aim at simplicity and hope for truth (Theory Quotes)
No theory ever agrees with all the facts in its domain, yet it is not always the theory that is to blame. Facts are constituted by older ideologies, and a clash between facts and theories may be proof of progress. It is also a first step in our attempt to find the principles implicit in familiar observational notions (Theory Quotes)
There is no such thing as absolute truth and absolute falsehood. The scientific mind should never recognise the perfect truth or the perfect falsehood of any supposed theory or observation. It should carefully weigh the chances of truth and error and grade each in its proper position along the line joining absolute truth and absolute error (Theory Quotes)
Twenty years ago many chemists would have defended the theory of bond arms as a satisfactory explanation because they had become accustomed to thinking of it as unique and as ultimate (Theory Quotes)
To look for a single general theory of how to decide the right thing to do is like looking for a single theory of how to decide what to believe (Theory Quotes)
Within the period of human history we do not know of a single instance of the transformation of one species into another one. It may be claimed that the theory of descent is lacking, therefore, in the most essential feature that it needs to place the theory on a scientific basis, this must be admitted (Theory Quotes)
I have little faith in the theory that organized killing is the best prelude to peace (Theory Quotes)
I have a theory of my own about what the art of the novel is, and how it came into being... It happens because the storyteller’s own experience... has moved him to an emotion so passionate that he can no longer keep it shut up in his heart (Theory Quotes)
The overwhelming number of teachers... are unable to name or describe a theory of learning that underlies what they do (Theory Quotes)
Governments do not necessarily act in the national interest, especially when making detailed microeconomic interventions. Instead, they are influenced by interest group pressures. The kinds of interventions that new trade theory suggests can raise national income will typically raise the welfare of small, fortunate groups by large amounts, while imposing costs on larger, more diffuse groups (Theory Quotes)
I am sometimes perplexed by people who refer to defensive rifles, or defensive rifle shooting. The defensive arm is the pistol, since you have it at hand to meet situations that you do not anticipate. If you have the luxury of anticipating a lethal encounter, you pick up a long arm, either a rifle or a shotgun, but in that case you go on to the attack. Thus rifle shooting is offensive, and pistol shooting is defensive. Of course, life does not always duplicate theory, and there are exceptions to everything, but nevertheless the rifle is not a defensive weapon in concept (Theory Quotes)
In the next place, the state governments are, by the very theory of the constitution, essential constituent parts of the general government. They can exist without the latter, but the latter cannot exist without them (Theory Quotes)