The situation in the sciences is this: A concept or an idea which cannot be measured or cannot be referred directly to experiment may or may not be useful. It need not exist in a theory.
concept directly exist
Richard P. Feynman
These are some quotes by American author Richard P. Feynman Physicist, who lived between May 11, 1918 and February 15, 1988.
Quotes by Richard P. Feynman
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Socialism has no moral justification whatsoever; poor people are not morally superior to rich people, nor are they owed anything by rich people simply because of their lack of success. Charity is not a socialist concept - it is a religious one, an acknowledgment of God's sovereignty over property, a sovereignty the Left utterly rejects.