Full Idea
Original parts are the best candidates for being essential to artefacts. It is hard to conceive how an object could have as essential a part which was attached at some time after the object had come into being.
Gist of Idea
Original parts are the best candidates for being essential to artefacts
Source
Peter Simons (Parts [1987], 7.4)
Book Reference
Simons,Peter: 'Parts: a Study in Ontology' [OUP 1987], p.271
A Reaction
Without its big new memory upgrade my computer would be hopelessly out of date. Simons is awesome in some ways, but seems rather confused when it comes to discussing essence. I think Wiggins may have been a bad influence on him.