Abstract

This paper argues for a moderate form of essentialism about indexical thought. According to this moderate essentialism, there is a significant category of intentional action that necessarily involves indexical thought. This category of action is navigation, that is, intentionally moving from one location to another by using public information about the world such as a map or a set of directions. It is shown that anti-essentialists face a challenge in accounting for this kind of action without accepting the involvement of indexical thought or something equivalent. The conclusion that navigation necessarily requires indexical thought is neutral on the strong essentialist claim that there is a special class of indexical propositional attitudes that mandate rejecting standard theories of propositional attitudes. The conclusion is also neutral on the strong essentialist claim that any kind of intentional action necessarily requires indexical thought.