In Being and Time Heidegger believes that Dasein is the only being who has existence, he also argues Dasein has two existential modes: authenticity and in-authenticity. inauthenticity is usual Dasein’s existence, A way of Being in which Dasein has strayed away of himself and has fallen into the chaos of others. In this way of Being he deals to beings as others do, just in terms of efficiency an...