Full Idea
Lewis's simplicity and strength criteria introduce an element of subjectivity into the laws, because the best system seems to be determined by what we take to be simple and strong in a system.
Gist of Idea
If simplicity and strength are criteria for laws of nature, that introduces a subjective element
Source
comment on David Lewis (Psychophysical and theoretical identifications [1972]) by Stephen Mumford - Laws in Nature 3.5
Book Reference
Mumford,Stephen: 'Laws in Nature' [Routledge 2006], p.45
A Reaction
[Mumford cites Armstrong 1983:67 for this]