 Consider questions about the nature of propositions, mathematical objects, or other abstracta. Perhaps these are atemporal entities, existing outside of time/spacetime, and not standing in any spatiotemporal relations to other entities. What sorts of considerations might bear on whether they are or not? Take propositions, the true or false things sentences express. Take a sentence that changes its truth-value over time (e.g., “It’s sunny”). Does such a sentence express different propositions at different times (that it’s sunny at \(t_1\), that it’s sunny at \(t_2\), etc.)? Or does it express the same proposition over time (that it’s sunny)? If it’s the former, then the propositions expressed don’t themselves change truth-value. If it’s the latter, the proposition (that it’s sunny) itself changes truth-value. In this latter case, that might give one reason think that the proposition is located within time rather than outside of it. On the other hand, it might not. After all, the truth-value also seems to vary with spatial location; yet we may be reluctant to infer from this that the proposition has spatial locations.