 The Oxford English Dictionary’s entry for the first person pronoun “I” says: “Used by the speaker or writer referring to himself or herself.” This is plausibly a linguistic rule: it is correct English to use “I” this way. The definition also determines the reference of (a particular utterance of) “I”. It seems reasonable, then, to think of this rule as giving the meaning of “I” (Kaplan 1989a: 520–521; Reichenbach 1947, 284).