Theory Quotes

2628 Theory quotes by 1622 unique authors

There never comes a point where a theory can be said to be true. The most that one can claim for any theory is that… — A.J. Ayer
Theoretical principals must sometimes give way for the sake of practical advantages. — William Pitt, 1st Earl of Chatham
Every theory is a self-fulfilling prophecy that orders experience into the framework it provides. — Ruth Hubbard
A little experience often upsets a lot of theory. — S. Parkes Cadman
One of my current pet theories is that the winter is a kind of evangelist, more subtle than Billy Graham, of course, but of the… — Shirley Ann Grau
Cell genetics led us to investigate cell mechanics. Cell mechanics now compels us to infer the structures underlying it. In seeking the mechanism of heredity… — C. D. Darlington
In the expressions we adopt to prescribe physical phenomena we necessarily hover between two extremes. We either have to choose a word which implies more… — Arthur Schuster
Anyone who has examined into the history of the theories of earth evolution must have been astounded to observe the manner in which the unique… — Unknown Author
Generally speaking, geologists seem to have been much more intent on making little worlds of their own, than in examining the crust of that which… — Henry De la Beche
Much as I admired the elegance of physical theories, which at that time geology wholly lacked, I preferred a life in the woods to one… — John Tuzo Wilson
A man who is all theory is like "a rudderless ship on a shoreless sea." ... Theories and speculations may be indulged in with safety… — Elisha Gray
What the founders of modern science, among them Galileo, had to do, was not to criticize and to combat certain faulty theories, and to correct… — Unknown Author
The test of a theory is its ability to cope with all the relevant phenomena, not its a priori 'reasonableness'. The latter would have proved… — John Polkinghorne
The theory of the earth is the science which describes and explains changes that the terrestrial globe has undergone from its beginning until today, and… — Unknown Author
We regard as 'scientific' a method based on deep analysis of facts, theories, and views, presupposing unprejudiced, unfearing open discussion and conclusions. The complexity and… — Andrei Sakharov
The physiological combustion theory takes as its starting point the fundamental principle that the amount of heat that arises from the combustion of a given… — Robert Mayer
... one of the main functions of an analogy or model is to suggest extensions of the theory by considering extensions of the analogy, since… — Mary Hesse
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… — Niels Henrik Abel
A metaphysical conclusion is either a false conclusion or a concealed experimental conclusion. — Hermann von Helmholtz
A new theory is guilty until proven innocent, and the pre-existing theory innocent until proven guilty ... Continental drift was guilty until proven innocent. — David M. Raup
A theory which cannot be mortally endangered cannot be alive. — W. A. H. Rushton
All good intellects have repeated, since Bacon's time, that there can be no real knowledge but that which is based on observed facts. This is… — Auguste Comte
Any theory is better than no theory. — Fuller Albright
But, contrary to the lady's prejudices about the engineering profession, the fact is that quite some time ago the tables were turned between theory and… — Unknown Author
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.… — Nelson Goodman

Who Wrote These Theory Quotes

1,622 authors contributed a total of 2,628 Theory Quotes, led by these top contributors: