Full Idea
At base it is not merely, as Lewis says, that everything else supervenes on the Mosaic; but rather that anything that exists at all is just a feature or element or generic property of the Mosaic.
Gist of Idea
Lewis says it supervenes on the Mosaic, but actually thinks the Mosaic is all there is
Source
Tim Maudlin (The Metaphysics within Physics [2007], 6)
Book Reference
Maudlin,Tim: 'The Metaphysics within Physics' [OUP 2007], p.171
A Reaction
[Maudlin has just quoted Idea 16210] Correct about Lewis, but Lewis just has a normal view of supervenience. Only 'emergentists' would think the supervenience allowed anything more, and they are deeply misguided, and in need of help.
Related Idea
Idea 16210 Humean supervenience says the world is just a vast mosaic of qualities in space-time [Lewis]