Sort of but Sort of Not: The Theory of Metaphysical Indeterminacy

This thesis is an investigation into metaphysical indeterminacy. The project initially aims to scope out the available options for token theories, and to clarify the choice between them in a systematic manner. Following a meta-theoretical excursion concerning the target and motivation for such theorizing, I then move on to provide a comparative and systematic framework for the discussion of the nature of indeterminacy. That model’s utility is then exemplified by its ability to distinguish some variants of Supervaluationism. Finally, some of the foregoing is utilized to reply to some arguments that seek to derive metaphysical indeterminacy from semantic indeterminacy. The project then moves on to discuss distinctively metaphysical indeterminacy, and it is shown how the previous model can be straightforwardly fleshed out to model the options. I subsequently move on to critically engage with three extant substantive proposals from the literature about the nature of metaphysical indeterminacy.