In his preface to the Scénario Freud, J.-P. Pontalis writes, "Il me paraît incontestable que Sartre a su rendre sensibles, et donc d"abord sensibles à lui, un certain nombre de phénomènes dont la notion de mauvaise foi … ne suffit plus à rendre compte" (SF 16). De Beauvoir tells us that Sartre originally "wrought" the notion of mauvaise foi in order to account for these phenomena within the framework of a philosophy of consciousness. It is probably true that Sartre was eventually able to recognise the inadequacy of the idea of bad faith in accounting for such phenomena as parapraxes and hysterical symptoms, but it is far less certain — on the evidence, for example, of L"Idiot — that he ever fully accepted the explanation proposed for such phenomena by the Freudian notion of the dynamic unconscious.