 A similar claim can be found in Berkeley’s Three Dialogues (1713: 231–234; Stoneham 2002: §6.4). Further, Locke makes self-consciousness partly definitive of the very concept of a person, a person being “a thinking intelligent Being, that has reason and reflection, and can consider it self as it self, the same thinking thing in different times and places” (1700: II. xxvii.9; Ayers 1991: vol.II, ch.23; Thiel 2011: ch. 4), and self-consciousness also plays an important role in his theory of personal identity (see  §4.1).