Inauthenticity (n.) is when we are absorbed with the things in the world; authenticity is when we are concerned with Dasein’s own potentiality.
Inauthenticity (n.) is based in the fact that, in average everydayness, I do not usually distinguish myself from the others—rather, the others are mostly those from whom I do not distinguish myself.
Inauthenticity (n.) is structured temporally in a threefold manner: idle talk (past), curiosity (future), and ambiguity (present).
Inauthenticity (n.) is a kind of uncircumspective tarrying alongside everything and nothing.
Inauthenticity (n.) is temporally structured such that the past and future are subordinated to the present, whereas in authenticity, the present gains a fresh and deeper meaning from the past and, especially, from the future.