Originally Posted By: finiter
Physics should deal with realities.

"As far as the propositions of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality." (Albert Einstein)

"The idea of the measuring rod and the idea of the clock coordinated with it in the theory of relativity do not find their exact correspondence in the real world." (Albert Einstein)

"There are many self-consistent mathematical systems which have scant relevance to physical phenomena or observations.” (Simon Prokhovnik; Head of the School of Mathematics, UNSW)

"Knowledge is one-dimensional; the proper application of knowledge is multi-dimensional. Only the extremely wise, and the exceptionally foolish, are not prepared to change.” (Confucius)