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10. Modality / B. Possibility / 3. Combinatorial possibility

[possibilities are combinations of the actual]

4 ideas
Maybe possibilities are recombinations of the existing elements of reality [Mumford]
Combinatorial possibility has to allow all elements to be combinable, which seems unlikely [Mumford]
Combinatorial possibility relies on what actually exists (even over time), but there could be more [Mumford]
Combinatorial theories of possibility assume the principles of combination don't change across worlds [Rosen]