Date: 1901-2, 1902

"In the end we fall back on the hackneyed symbolism of a mechanical equilibrium. A mind is a system of ideas, each with the excitement it arouses, and with tendencies impulsive and inhibitive, which mutually check or reinforce one another."

— James, William (1842-1910)

Date: 1964

"Its productivity and efficiency, its capacity to increase and spread comforts, to turn waste into need, and destruction into construction, the extent to which this civilization transforms the object world into an extension of man's mind and body makes the very notion of alienation questionable. ...

— Marcuse, Herbert (1898-1979)

Date: November 22, 1990

"One is not an immaterial soul, floating around in a machine."

— Sacks, Oliver (b. 1933)

Date: 1999

"On its own this trigger, as we can see from the earlier definition, is not going to generate consciousness. Imagine a candyfloss machine with a stick in the centre that then gathers more and more candyfloss as time goes on. Think of the epicentre as the stick in the centre, the burgeoning candy...

— Greenfield, Susan (b. 1950)

Date: 1999

"But fiction is not empirical truth. It is simulation that runs on minds of readers just as computer simulations run on computers."

— Oatley, Keith

Date: 2000

"This lonely organ, which has appeared to be imprisoned in the skull, tormenting intellectuals throughout history,' said Jean-Paul merrily, 'may after all be a transceiver, tuning into various types of extraphysical mind, and contributing to them with its own broadcasts.'"

— Edward St. Aubyn (b. 1960)