Sartre posed a problem for himself in his discussion of bad faith: how is it possible to deceive oneself, given the unity and translucency of consciousness? Many critics of Sartre interpret translucency as transparency; some, such as M.R. Haight, conclude that Sartre's account of consciousness makes self-deception impossible.A reply to those critics takes the form of showing that translucent consciousness has a number of dimensions: (a) non-positional versus positional aspects; (b) prereflective versus reflective levels; (c) temporally synthetic flux; and (d) (...) the first-person perspective versus the third-person perspective. These dimensions enable Sartre to succeed in describing subtle and varied patterns of self-deception, based on such strategies as obscuring, evasion, distraction, misdescription and disavowal. The translucency of consciousness is not a barrier to self-deception.However, there is another problem in Sartre's claim that all purposive activity is conscious, including our practice of self-deception. The bodily subject of consciousness performs important purposive activities beyond the range of the most obscure non-positional consciousness. This calls into question Sartre's existentialist claim that we are wholly responsible for all we do. (shrink)