1969, Marcia M. Eaton, “Art, Artifact, and Intentions”. American Philosophical Quarterly, 6, p. 165. These philosophers argue that the fact that someone might point to a piece of driftwood and say, “There is a work of art,” and further say, “That is not an artifact,” proves that artifactuality is not a necessary condition of a thing’s being a work of art.
Source: wiktionary