Deception and self-deception are intimately intertwined. We fool ourselves in order to fool others, and we fool others in order to fool ourselves.
Philosophy, Psychology
we live now in circumstances that encourage rather than discourage lying; evidence and activity are more easily concealed, and the need to rely on demeanor as an indicator of a person’s truthfulness is greater. And our evolutionary history has not prepared us to be very sensitive to the behavioral clues relevant to lying.
Psychology