“…I shall henceforth assume that all the terms in question refer to the same property, which I shall call “vivacity.” Hume thinks that all impressions seem or feel more immediately real than any ideas or beliefs, although he does allow a “near resemblance in a few instances” (T 1.1.1.1, SBN 2). Although detailed interpretations of vivacity vary, I take it that any increase in a perception's vivacity involves (or, perhaps, is) an increase in the extent to which it seems really present (e.g., Boehm, 2013; Dauer, 1999; Waxman, 1994). Impressions are maximally vivid, so that we take them to be immediately and presently real rather than merely thought of or representative of something elsewhere, as we take ideas and beliefs to be.…”