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Edward Condon

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If physics is too difficult for the physicists, the nonphysicist may wonder whether he should try at all to grasp its complexities and ambiguities. It is undeniably an effort, but probably one worth making, for the basic questions are important and the new experimental results are often fascinating. And if the layman runs into serious perplexities, he can be consoled with the thought that the points which baffle him are more than likely the ones for which the professionals have not found satisfactory answers.
--
Physics, in What is Science?: Twelve Eminent Scientists and Philosophers Explain Their Various Fields to the Layman, by James Roy Newman, published by Simon and Schuster (1955), p. 102

 
Edward Condon

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I decided to get Ph.D. in experimental physics because experimental physicists have their own room in the Institute where they can hang their coat, whereas theoretical physicists have to hang their coat at the entrance.

 
George Gamow
 

This is the reason why all attempts to obtain a deeper knowledge of the foundations of physics seem doomed to me unless the basic concepts are in accordance with general relativity from the beginning. This situation makes it difficult to use our empirical knowledge, however comprehensive, in looking for the fundamental concepts and relations of physics, and it forces us to apply free speculation to a much greater extent than is presently assumed by most physicists.

 
Albert Einstein
 

The first question we should face is: What is the aim of a physical theory? To this question diverse answers have been made, but all of them may be reduced to two main principles:
"A physical theory," certain logicians have replied, "has for its object the explanation of a group of laws experimentally established."
"A physical theory," other thinkers have said, "is an abstract system whose aim is to summarize and classify logically a group of experimental laws without claiming to explain these laws...
Now these two questions — Does there exist a material reality distinct from sensible appearances? and What is the nature of reality? — do not have their source in experimental method, which is acquainted only with sensible appearances and can discover nothing beyond them. The resolution of these questions transcends the methods used by physics; it is the object of metaphysics.
Therefore, if the aim of physical theories is to explain experimental laws, theoretical physics is not an autonomous science; it is subordinate to metaphysics...
Now, to make physical theories depend on metaphysics is surely not the way to let them enjoy the privilege of universal consent.

 
Pierre Duhem
 

Those who advocate common usage in philosophy sometimes speak in a manner that suggests the mystique of the 'common man.' They may admit that in organic chemistry there is need of long words, and that quantum physics requires formulas that are difficult to translate into ordinary English, but philosophy (they think) is different. It is not the function of philosophy — so they maintain — to teach something that uneducated people do not know; on the contrary, its function is to teach superior persons that they are not as superior as they thought they were, and that those who are really superior can show their skill by making sense of common sense. No one wants to alter the language of common sense, any more than we wish to give up talking of the sun rising and setting. But astronomers find a different language better, and I contend that a different language is better in philosophy. Let us take an example, that of perception. There is here an admixture of philosophical and scientific questions, but this admixture is inevitable in many questions, or, if not inevitable, can only be avoided by confining ourselves to comparatively unimportant aspects of the matter in hand. Here is a series of questions and answers.
Q. When I see a table, will what I see be still there if I shut my eyes?
A. That depends upon the sense in which you use the word 'see.'
Q. What is still there when I shut my eyes?
A. This is an empirical question. Don't bother me with it, but ask the physicists.
Q. What exists when my eyes are open, but not when they are shut?
A. This again is empirical, but in deference to previous philosophers I will answer you: colored surfaces.
Q. May I infer that there are two senses of 'see'? In the first, when I 'see' a table, I 'see' something conjectural about which physics has vague notions that are probably wrong. In the second, I 'see' colored surfaces which cease to exist when I shut my eyes.
A. That is correct if you want to think clearly, but our philosophy makes clear thinking unnecessary. By oscillating between the two meanings, we avoid paradox and shock, which is more than most philosophers do.

 
Bertrand Russell
 

We are, each one of us, ordained to live out our lives in the context of ultimate questions, such as:
Why is there anything at all, rather than nothing?
Where did the laws of physics come from?
Why does the universe seem so strange?
My response to such questions has been to articulate a covenant with Mystery. Others, of course, prefer to respond with answers, answers that often include a concept of god. These answers are by definition beliefs since they can neither be proven nor refuted. They may be gleaned from existing faith traditions or from personal search. God may be apprehended as a remote Author without present-day agency, or as an interested Presence with whom one can form a relationship, or as pantheistic — Inherent in All Things.
The opportunity to develop personal beliefs in response to questions of ultimacy, including the active decision to hold no Beliefs at all, is central to the human experience. The important part, I believe, is that the questions be openly encountered. To take the universe on — to ask Why Are Things As They Are? — is to generate the foundation for everything else.

 
Ursula Goodenough
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