Famous quotes containing the words leach and/or product:
“Your preschool child will chatter endlessly to you. If you half-listen and half-reply the whole conversation will seem, and become, tediously meaningless for both of you. but if you really listen and really answer, he will talk more and what he says will make more sense.”
—Penelope Leach (20th century)
“The product of mental labor—science—always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.”
—Karl Marx (1818–1883)