Self-Deception, Properly understood, Is not paradoxical. Although self-Deception involves motivated false belief, It is not properly modeled after "intentional" interpersonal deception. Thus, The major source of paradox is dissolved. Moreover, Even intentional self-Deception need not be paradoxical and there is good reason to believe that a kind of self-Deception which "would" be paradoxical never occurs. Finally, In cases of self-Deception, As in instances of akratic action, There is scope for blame.

In this engaging study, the authors put casuistry into its historical context, tracing the origin of moral reasoning in antiquity, its peak during the sixteenth and early seventeenth century, and its subsequent fall into disrepute from the mid-seventeenth century.