Full Idea
Armstrong has a distinctive conception of (fundamental) properties as contingently existing beings with multiple locations in space and time.
Gist of Idea
Properties are contingently existing beings with multiple locations in space and time
Source
report of David M. Armstrong (A World of States of Affairs [1997]) by David Lewis - A world of truthmakers? p.220
Book Reference
Lewis,David: 'Papers in Metaphysics and Epistemology' [CUP 1999], p.220
A Reaction
Armstrong tries to get a naturalistically founded platonism (which he claims is Aristotelian), but the idea that one thing can be multiply located strikes me as daft (especially if the number of its locations increases or decreases).