In order to avoid any subjectivistic equivocation, Heidegger went so far as to renounce the use of the term consciousness, preferring the term Dasein, which is more appropriate for designating human reality in its totality. For the same reasons, the traditional opposition between subject and object, or between the self and the nonself, loses all sense. Dasein is always particular and individual. Being thrown means, for man, being abandoned to the whirling flow of things in the world and to their determinism. Jaspers has perhaps been the one to insist most on the relationship between truth and communication.
Truths are and can be different from existence.
Sartre, however, denies that there is authentic communication. According to him, consciousness is not only the nullification of things but also the nullification of the other person as other. To look at another person is to make of him a thing. This is the profound meaning of the myth of Medusa. Sexuality itself, which Sartre holds to be an essential aspect of existence, fluctuates between sadism and masochism, in which either the other person or oneself is merely a thing.