Supreme Court Gives Us Presidents...
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No best answer has yet been selected by jc72537. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.It's quoted in a lot of web-sites - I checked ten or so - but not with the book or letter he wrote it in. Here are two semi-helpful extracts.
IN 1610, GALILEO GALILEI SAID, �WE MUST measure what can be measured, and make measurable what cannot be measured.�
Galilei, Galileo (1564 - 1642)
Measure what is measurable, and make measurable what is not so.
Quoted in H. Weyl "Mathematics and the Laws of Nature" in I Gordon and S. Sorkin (eds.) The Armchair Science Reader, New York: Simon and Schuster, 1959.
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