Source: Quotes of Sol Lewitt, "Paragraphs on Conceptual Art," 1967, p. 80. Cited in: Diane Waldman. Carl Andre https://archive.org/stream/carlandre00wald#page/7/mode/1up. Published 1970 by Solomon R. Guggenheim Museum in New York. p. 7
“Conceptual art, for me, means work in which the idea is paramount and the material form is secondary, lightweight, ephemeral, cheap, unpretentious and/or "dematerialized."”
Source: Six Years: The Dematerialization of the Art Object from 1966 to 1972 (1973), p. vii.
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Lucy R. Lippard 8
American art curator 1937Related quotes
Subtitle of the book.
Six Years: The Dematerialization of the Art Object from 1966 to 1972 (1973)

'Joseph Kosuth: Introductory note by the American editor', in Art-Language Vol.1 Nr.2, Art & Language Press, Chipping Norton (February 1970), p.3.
Source: Art & Other Serious Matters, (1985), pp. 247-248, "American Drawing"

note: Without this understanding a 'conceptual' form of presentation is little more than a manufactured stylehood, and such art we have with increasing abundance.
'Joseph Kosuth: Introductory note by the American editor', in Art-Language Vol.1 Nr.2, Art & Language Press, Chipping Norton (February 1970), p.3.