The number of different optical phenomena has become in our time so great that caution must be taken so as to avoid being deceived, and also to refer the phenomena to the simple laws.
--
In The Wave Theory, Light and Spectra. Prismatic and Diffraction Spectra. Memoirs by Joseph Von Fraunhofer (1981), p. 14 ISBN 0-405-13867-9Joseph von Fraunhofer
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The laws which governed the spontaneous jumps of the kangaroos were shown to be of the simplest; out of any number of kangaroos a certain proportion always jumped within a specified time, and nothing seemed to be able to change this number. Also, before the jumps took place, there was nothing in the world of phenomena to distinguish those kangaroos that were about to jump from those that were not... to help fill the quota demanded by the statistical law. As discontinuity marched into the world of phenomena through one door, causality walked out through another.
James Jeans
Bohr's investigation had typified what had become a standard procedure in problems of theoretical physics. The first step was to discover the mathematical laws governing certain groups of phenomena; the second was to devise hypothetical models or pictures to interpret these laws in terms of motion or mechanism; the third was to examine in what way these models would behave in other respects, and this would lead to prediction of other phenomena-predictions which might or might not be confirmed when put to the test of experiment. For instance, Newton had explained the phenomena of gravitation in terms of a force of gravitation; a later age had seen the luminiferous ether introduced to explain the propagation of light and, subsequently, the general phenomena of electricity and magnetism; finally Bohr had introduced electronic jumps in an attempt to explain atomic spectra. In each case the models had fulfilled their primary purpose, but had failed to predict further phenomena with accuracy.
James Jeans
I have not as yet been able to discover the reason for these properties of gravity from phenomena, and I do not feign hypotheses. For whatever is not deduced from the phenomena must be called a hypothesis; and hypotheses, whether metaphysical or physical, or based on occult qualities, or mechanical, have no place in experimental philosophy. In this philosophy particular propositions are inferred from the phenomena, and afterwards rendered general by induction.
Isaac Newton
There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult. It demands the same skill, devotion, insight, and even inspiration as the discovery of the simple physical laws which underlie the complex phenomena of nature.
C. A. R. Hoare
[Biology has] become the paramount science, exceeding other disciplines, including physics and chemistry at least, in the creative tumult of its disciplines and disputations. [...] I'll also be so bold at this point to suggest that we are now at the edge of establishing the two fundamental laws of biology: The first law is that all of the phenomena of biology, the entities and the processes, are ultimately obedient to the laws of physics and chemistry. Not immediately reducible to them, but ultimately consistent and in consilience with them, by a cause and effect explanation. The second law is that all biological phenomena, these entities and processes that define life itself, have arisen by evolution through natural selection.
E. O. Wilson
von Fraunhofer, Joseph
von Galen, Clemens August Graf
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