Pierre is Late
When we go about the world, we have expectations which are often not fulfilled. For example, Pierre is not at the café where we thought we would meet him, so there is a negation, a void, a nothingness, in the place of Pierre. When looking for Pierre his lack of being there becomes a negation; everything he sees as he searches the people and objects about him are "not Pierre." So Sartre claims "It is evident that non-being always appears within the limits of a human expectation."
Designers: Ali Emre Dogramaci