Date: 1958

"Consciousness is like a bottomless lake in which ideas are suspended at different depths."

— Peirce, Charles Sanders (1839-1914)

Date: 1976

"They [Marsall McLuhan's ideas] are Turkish baths of the mind."

— Bell, Daniel (1919-2011)

Date: 1979

" But they can be sent along the usual channels […] until at some critical point, a "mental faucet" is closed, preventing them from actually being carried out."

— Hofstadter, Douglas (b. 1945)

Date: 1981

"When we introspect we do not perceive 'concepts' flowing through our minds as such. Stop the stream of thought when or where we will, what we catch are words, images, sensations, feelings."

— Putnam, Hilary (b. 1926)

Date: 1983

"Hume's account of mental happenings is geographical in the broadest sense, a description of human economy and ecology, not just a record of topography and a positioning of land masses but a marking of the tidal movements and trade routes of the mind as it negotiates for ease and stability."

— Richetti, John (b. 1938)