Full Idea
Ordinary artefacts are individuated, rather indeterminately and arbitrarily, by reference to a parcel of matter so organised as to subserve a certain function.
Gist of Idea
Artefacts are individuated by some matter having a certain function
Source
David Wiggins (Sameness and Substance [1980], 3.3)
Book Reference
Wiggins,David: 'Sameness and Substance' [Blackwell 1980], p.90