ABSTRACT
Some philosophers suggest that there’s an interesting relation between laws and natural kinds.1 To have a collection of laws is to implicitly have a group of natural kinds that obey the laws. Conversely, to have a collection of natural kinds is to implicitly have a set of laws they obey. However things sort out for laws and natural kinds, this relation holds of ob*-similar sorts and ob*-regularities (or, for naturalness, “observational regularities”).
