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Published online by Cambridge University Press: 01 January 2022
In this article, I examine the relationship between physical quantities and physical states in quantum theories. I argue against the claim made by Arageorgis that the approach to interpreting quantum theories known as Algebraic Imperialism allows for “too many states.” I prove a result establishing that the Algebraic Imperialist has very general resources that she can employ to change her abstract algebra of quantities in order to rule out unphysical states.
I would like to thank Hans Halvorson, Jim Weatherall, and two anonymous referees for helpful comments.