Haecceitism informs several issues in the philosophy of language primarily through its conventional connection to realism about haecceities. Since haecceities uniquely correspond to individuals, realists about haecceities have a distinctive metaphysical resource for the development of semantic theories. In addition, for realists about haecceities who believe that all properties exist necessarily, haecceities of nonexistent individuals provide an especially natural metaphysical surrogate when explaining the possibility of true and meaningful claims about the individuals in question. So, for example, if one holds that singular terms like ‘Obama’ contribute the haecceity being Obama to the singular proposition expressed by sentences that include ‘Obama’, one can make sense of the truth and meaningfulness of claims regarding Obama in worlds in which Obama does not exist. (On this strategy, see Plantinga (1978: 132).) The general strategy of using haecceities as metaphysical surrogates for individuals has surfaced in debates about the philosophy of time, where, e.g., Markosian (2004: 54–56), considers appropriating haecceities of non-present individuals to address objections to presentism.