Full Idea
The 'spinning disc' is not metaphysically possible. We have every reason to believe that there is no such thing as 'perfectly homogeneous matter'. The atomic theory of matter is as well established as any scientific theory is likely to be.
Gist of Idea
The 'spinning disc' is just impossible, because there cannot be 'homogeneous matter'
Source
Tim Maudlin (The Metaphysics within Physics [2007], 7 Epilogue)
Book Reference
Maudlin,Tim: 'The Metaphysics within Physics' [OUP 2007], p.185
A Reaction
This is a key case for Maudlin, and his contempt for metaphysics which is not scientifically informed. I agree with him. Extreme thought experiments are worth considering, but impossible ones are pointless.
Related Idea
Idea 16211 A homogeneous rotating disc should be undetectable according to Humean supervenience [Hawley]