The folk explanation of self-deception is that one mental subsystem deceives another. Deflationists appeal to motivated irrationality rather than deceptive subsystems to offer nifty accounts of many sorts of self-deception. However, I shall show that deflationists cannot explain the self-deception embedded within (1) impulsive, (2) vacillating, or (3) long-term akrasia. These akratic actions are respectively too short, too variable, or too long for motivated irrationality to do its dirty work. Nor can deflationists explain the self-deception required for motivating oneself to (...) (4) suspend disbelief and lose oneself in fiction, (5) bother to make negligible contributions to very large projects, (6) accomplish daunting tasks by taking them one day at a time, or (7) cope with psychologically traumatic truths. In these four cases, the truth is undeniable, yet agents must also hold contravening false beliefs. Thus, the folk explanation of self-deception is preferable, despite its invocation of deceptive mental subsystems. (shrink)