Concept

Einstein, Albert Infeld, Leopold

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

The Evolution of Physics Chapter I (p. 31)

ALRICiHT "THEM -

HOW ABOUT t

ALRICiHT "THEM -

HOW ABOUT t

Weaver, Warren

With the extremely small or the extremely large, with inconceivably brief or extended phenomena, science has a difficult time. It is by no means clear that our present concepts or even our existing language is suitable for these ranges.

Science and Imagination Chapter 2 (p. 50)

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