Domain
State of the field
These questions border on the empirically inaccessible; progress is largely conceptual, and candidate answers (multiverse, brute fact, necessity) are hard to test.
All that exists is physical, and every phenomenon — including mind — is ultimately constituted by physical processes described (in principle) by physi…
There is no ultimate bottom level; what we call "fundamental" is always an effective description of deeper structure, with no final layer of brute fac…