Full Idea
The methodology of metaphysics... is that of arguing to the simplest explanation, without regard to testability.
Gist of Idea
Metaphysics aims at the simplest explanation, without regard to testability
Source
Brian Ellis (The Metaphysics of Scientific Realism [2009], 1)
Book Reference
Ellis,Brian: 'The Metaphysics of Scientific Realism' [Acument 2009], p.18
A Reaction
I love that! I'd be a bit cautious about 'simplest', since 'everything is the output of an ineffable God' is beautifully simple, and brings the whole discussion to a halt. I certainly think metaphysics goes deeper than testing. String Theory?