Three levels of identification: I is this human person (psyche or soul), I is the knowingness (witnessing), and I is being or That (you could say thatness but the adverbial 'that' is better, as verbs are better than nouns.) But what do you mean by identification? It can't describe some sort of action, a sort of projection like identifying with a fictional character, without begging the question. It's more like a reference level, a plateau where going backwards rests, an implied ground-state. This is to try to go backwards where projection goes forwards - the co-projection, you could say, reversing all the intentional arrows. Again, what it could mean is whatever mode of disidentification it requires. Every form of identification is the limit of the prior for of disidentification. That's how you come to use the idea - it doesn't need to mean anything more, in fact can't mean anything more. There is no limit to how far this could go.