more from David M. Armstrong

Single Idea 17690

[catalogued under 26. Natural Theory / D. Laws of Nature / 2. Types of Laws]

Full Idea

Three degress of law: 1) 'Oaken laws' where all Fs that aren't Hs are Gs; 2) 'Iron' laws where all Fs are Gs; and 3) 'Steel' laws where all Fs must be Gs.

Gist of Idea

Oaken conditional laws, Iron universal laws, and Steel necessary laws


report of David M. Armstrong (What is a Law of Nature? [1983], 10.4) by PG - Db (ideas)

Book Reference

Armstrong,D.M.: 'What is a Law of Nature?' [CUP 1985], p.148

A Reaction

[My summary of Armstrong's distinction] One response is to say that all laws are actually Oaken - see Mumfor and Mumford/Lill Anjum. It's all ceteris paribus.