 For each of the four foregoing notions of consciousness, some philosophers have claimed that that type of consciousness is entirely or largely explicable as a kind of representing. This entry will deal mainly with representational theories of consciousness in senses (3) and (4). The leading representational approaches to (1) and (2) are “higher-order representation” theories, which divide into “inner sense” or “higher-order perception” views, “acquaintance” accounts, and “higher-order thought” theories. For discussion of those, see the entry on  higher-order theories of consciousness.