The essay The Stanza of the Self: on Agamben's Potentiality in the new Contretemps online journal says this about Dasein and the world it's in:

[T]he elementarity, if not the purity, of Dasein is only potential in that its own very existence as 'Being' requires it to be thrown into the world of others where its original and elemental language, its identity, is traded for participating in and belonging to a community, a common language and a common identity. The intelligibility of the common space, its meaningfulness, is predicated upon the erasure of the original individual and the disappearance of what made it so unique, that is its original and pure language (Heidegger calls it 'voice'). Dasein cannot be seen and understood other than 'Being' in that as an individual sign with its unshared language it does not make sense; it does not have a meaning. Its 'Being' comes to fruition when Dasein chooses to enter the 'game' of the community and to be part of a set of linguistic and cultural trajectories and vectors amongst which its own trajectory and vector become lost and invisible, ultimately opaque.

So this vector of Dasein, it's variables are the ontological existentials: projection, thrownness, and being? And is forgotten a boundary condition of the being existential?  ¶ 9:54 PM