Kaplan (drawing on Montague and Prior, inter alia) made explicit the idea of world and time neutral propositions, which bear truth values only relative to world and time parameters. There was then a debate over the role of time. Temporalists sided with Kaplan in maintaining time neutral propositions with time relative truth values, while eternalists claimed that all propositions specify the needed time information and so bear the same truth value at all times. But there never was much of a (...) parallel debate over the role of worlds. Let contingentism be the view (parallel to temporalism) that sides with Kaplan in maintaining world neutral propositions with world relative truth values, and let necessitarianism be the view (parallel to eternalism) that propositions specify the needed world information and so bear the same truth value at all worlds. This is the story of how the debate between the contingentists and the necessitarians might begin. (shrink)

Aristotle and Aquinas may have held that the things we believe and assert can have different truth-values at different times. Stoic logicians did; they held that there were “vacillating assertibles”—assertibles that are sometimes true and sometimes false. Frege and Russell endorsed the now widely accepted alternative, where the propositions believed and asserted are always specific with respect to time. This paper brings a new perspective to this question. We want to figure out what sorts of propositions speakers believe. Some philosophers (...) have argued that we must take agents to believe temporalist propositions—propositions that are inspecific with respect to time—if we’re to explain the agent’s own thoughts and inferences. I’ll explore another strategy. I’ll focus on our ability to think and reason about the beliefs that other people have. I’ll suggest that an adequate account of that ability requires that we take others to believe some temporalist propositions. I also ask whether all propositions can be specific with respect to worlds, and close by exploring some general issues. (shrink)

According to indexical contextualism, the perspectival element of taste predicates and epistemic modals is part of the content expressed. According to nonindexicalism, the perspectival element must be conceived as a parameter in the circumstance of evaluation, which engenders “thin” or perspective-neutral semantic contents. Echoing Evans, thin contents have frequently been criticized. It is doubtful whether such coarse-grained quasi-propositions can do any meaningful work as objects of propositional attitudes. In this paper, I assess recent responses by Recanati, Kölbel, Lasersohn and MacFarlane (...) to the “incompleteness worry”. None of them manages to convince. Particular attention is devoted to an argument by John MacFarlane, which states that if perspectives must be part of the content, so must worlds, which would make intuitively contingent propositions necessary. I demonstrate that this attempt to defend thin content views such as nonindexical contextualism and relativism conflates two distinct notions of necessity, and that radical indexicalist accounts of semantics, such as Schaffer’s necessitarianism, are in fact quite plausible. (shrink)