There are three principal means of acquiring knowledge... observation of nature, reflection, and experimentation. Observation collects facts; reflection combines them; experimentation verifies the result of that combination.
-- Denis Diderot
   
Denis Diderot   Name:
Denis Diderot
Type:
Editor
Nationality:
French
Birth:
October 5, 1713
Death:
July 31, 1784
https://www.nutquote.com/quote/Denis_Diderot