 A type of direct realism that has received much recent attention is disjunctivism (e.g., Snowdon 1980, McDowell 1982, Martin 2002, Haddock &amp; Macpherson 2008; see the entry on the   disjunctive theory of perception).  There are many different versions of disjunctivism, but a common thread is the claim that the experiences involved in the veridical case are ipso facto of a different type than those involved in the hallucinatory cases. The theory of appearing (Alston 1999) is a type of disjunctivism but one that emphasizes the direct world-involvement in the veridical case rather than the radical difference between the cases.