Controlled Substance Analogue

Famous quotes containing the words controlled, substance and/or analogue:

“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)

“Ah, to build, to build!
That is the noblest art of all the arts.
Painting and sculpture are but images,
Are merely shadows cast by outward things
On stone or canvas, having in themselves
No separate existence. Architecture,
Existing in itself, and not in seeming
A something it is not, surpasses them
As substance shadow.”
—Henry Wadsworth Longfellow (1807–1882)

“Human language appears to be a unique phenomenon, without significant analogue in the animal world.”
—Noam Chomsky (b. 1928)