Full Idea
In principle I see no higher or more austere necessity than natural necessity; and in natural necessity, or our attribution of it, I see only Hume's regularities
Clarification
'Natural necessity' is bound by the laws of nature
Gist of Idea
There is no necessity higher than natural necessity, and that is just regularity
Source
Willard Quine (Necessary Truth [1963], p.76)
Book Reference
Quine,Willard: 'Ways of Paradox and other essays' [Harvard 1976], p.76
A Reaction
Presumably this allows logical necessity as a 'lower' necessity, but denies 'metaphysical' necessity, in line with Hume and other tough empiricists. Personally I adore metaphysical necessities, but they are a bit hard to establish conclusively.