Full Idea
Among the best candidates to play the roles of sortal and substantial predicates are the natural kind words.
Gist of Idea
Natural kinds are well suited to be the sortals which fix substances
Source
David Wiggins (Sameness and Substance [1980], 3.1)
Book Reference
Wiggins,David: 'Sameness and Substance' [Blackwell 1980], p.77
A Reaction
There is always a danger of circularity with this kind of approach. How do we distinguish the genuine natural kinds from the dubious ones?