Context-sensitive expressions are ones that "express different propositions relative to different contexts of use".[6] For example, some terms that are relatively uncontroversially considered context-sensitive are indexicals, such 'I', 'here', and 'now'. While the word 'I' has a constant linguistic meaning in all contexts of use, whom it refers to varies with context. Similarly, epistemic contextualists argue that the word 'knows' is context sensitive, expressing different relations in some different contexts.