Unlike the question of whether self-deception can be understood on the model of other-deception, the relationship between the two phenomena at the level of practice is hardly ever explored. Other-deception can support self-deception and vice versa. Self-deception often affects not only the beliefs and behavior of the self-deceiving person but also the beliefs and behavior of others who may become accomplices of self-deception. As I will show, however, it is difficult to describe this supportive relationship between self-deception and the deception (...) of others without conceptual contradiction. While “deflationary” approaches offer a convincing way to avoid the so-called paradoxes of self-deception, they do not resolve the conceptual tensions that arise here. I conclude by outlining a solution. (shrink)