The Collaborative International Dictionary of English v.0.48:

Self-consistent \Self`-con*sist"ent\, a.
   Consistent with one's self or with itself; not deviation from
   the ordinary standard by which the conduct is guided;
   logically consistent throughout; having each part consistent
   with the rest.
   [1913 Webster]

WordNet (r) 3.0 (2006):

self-consistent
    adj 1: not self-contradictory