 Those perceptions that we attend to can seem to drown out the others and produce the illusion that they alone exist, whereas those perceptions that we are less conscious of can be so faint that it is impossible to recall that we have had them the instant after the stimulus that produced them fades. Those perceptions that we attend to can also continue for some time after the stimulus that produced them has ceased. This produces an experience that Condillac referred to as “reminiscence” (réminiscence). An object continuously acting on our sense organs causes us to now experience a particular perception while we are simultaneously conscious of an echo, as it were, of an identical past perception, produced just a moment ago. Condillac’s reasoning is less than explicit at this point, but he seems to have taken this experience to provide us with an awareness of what we might call the “pastness” of the echo, and at the same time of the continued existence of an identical self which experienced both the past perception and the current ones. The idea of self is thus not the product of a Cartesian intellectual intuition. Like the idea of one’s own extended body and of other extended things, it is discovered through having a particular kind of sensory experience, in this case, the experience of reminiscence (Essay I.ii.1. §15).