In order to support this claim, Herbart considers two cases: (a) the assimilation of a sense-representation (a “sensum”), called “outer apperception”; and (b) the assimilation of a reproduced (i.e., recollected) representation from below the limen, called “inner apperception” (Stout 1888b: 448). The latter is treated as analogous to the former (Stout 1889: 448).