Definition from Wiktionary, the free dictionary
ersatz + -ism
- (metaphysics) The doctrine that only one concrete world exists, and all other possible worlds are abstract
2008 April 25, Mark Heller, “The Donkey Problem”, Philosophical Studies, volume 140, number 1, DOI:10.1007/s11098-008-9227-z:
- One of Lewis’s challenges to linguistic ersatzism focuses on the inelimanibility[sic] of modality in connecting different levels of ontological description.