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In page Witches' Sabbath (The Great He-Goat):

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Describing the techniques employed in the Black Paintings, particularly the visible black ground paint, art historian Barbara Stafford said that "by brusquely inlaying spots of light with prevailing darkness, Goya's aquatinted and painted visions demonstrated the powerlessness of the unmoored intellect to unify a monstrously hybrid experience according to its own a priori transcendental laws."[8]