 It is important to recognise that no project of “sincerity”, if that is understood as strictly being what one is, is possible for Sartre given his view of the for-itself. Likewise, in regard to any substantive self-knowledge that might be achieved through direct self-consciousness, our options are limited. On Sartre’s view we cannot look inwards and discover the truth about our identity or our own bad faith through simple introspection (there is literally no-thing to observe). Moreover, when we have a lived experience, and then reflect on ourselves from outside (e.g., third-personally), we are not strictly reducible to that Ego that is so posited. We transcend it. Or, to be more precise, we both are that Ego (just as we are what the Other perceives) and yet are also not reducible to it. This is due to the structure of consciousness and the arguments from Transcendence of the Ego examined in  section 2.  In Being and Nothingness, the temporal aspects of this non-coincidence are also emphasised. We are not just our past and our objective attributes in accord with some sort of principle of identity, because we are also our “projects”, and these are intrinsically future oriented.