Famous quotes containing the words controlled and/or natural:
“Science is a system of statements based on direct experience, and controlled by experimental verification. Verification in science is not, however, of single statements but of the entire system or a sub-system of such statements.”
—Rudolf Carnap (1891–1970)
“The dead being the majority it is a natural thing that we should have more friends among these than among the living.”
—Samuel Butler (1835–1902)