Abstract In accounts of indexicals, we encounter two problems: the problem of cognitive significance and the problem of cognitive dynamics. The problem of cognitive significance leads us to posit finer-grained sense content to account for the explanation of our actions and emotions. Meanwhile the problem of cognitive dynamics calls us to show how two episodes of thought can have the same fine-grained sense content even though they are expressed in different ways in different times and places. Bojislav Bozickovic offers a solution to the problem of cognitive dynamics by using objects to tie together different ways in which a sense content might be expressed, and arguing that the sense expressions might become untied if we come to wonder if we are talking about the same object. I argue that this strategy raises a number of questions, and may lead to destabilization of our thought contents based on past and future concerns about object identity.

ABSTRACT Tensism is the view that tense is not merely a property of language and the mind (narrowly individuated), but of the world itself. Perspectivalism extends this idea to all perspectival properties be they person (e.g. first person vs. second) or locational (e.g. here vs there). One challenge that perspectivalism faces is the problem of expressing the contents of the beliefs and utterances of persons that are in other perspectival positions. One proposed solution to this problem is to allow for semantic theories that "realign" the expression of contents so that the contents expressed by persons in other perspectival positions can be re-expressed from one's own perspectival position. In this paper I argue that a similar semantic realignment strategy could be deployed in helping perspectivalists generally (and presentists in particular) come to grips with a puzzle raised by the Special Theory of Relativity. In short, the strategy is to realign the expression of contents in another inertial frame so that they are expressed from within your inertial frame. As we will see, the strategy is not puzzle free.