Controlled Trial

Famous quotes containing the words controlled and/or trial:

“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)

“I have proved by actual trial that a letter, that takes an hour to write, takes only about 3 minutes to read!”
—Lewis Carroll [Charles Lutwidge Dodgson] (1832–1898)