2.     Ernst (1992, p. 82) incorrectly claims that the bed of Apolinère Enameled was only "semi-consciously or unconsciously" known by Duchamp as an impossible object. Also wrong is Ernst's claim that "Duchamp never pursued this line any further." As I shall show in a forthcoming article with Stephen Jay Gould, Duchamp consciously used or drew several other impossible figures in other works; moreover, an analysis of Duchamp's text in Apolinère Enameled shows that the bed's status as impossible is specifically and consciously indicated (see Shearer, 1998).