Being and Time raises the problem of "authenticity," that is, the potentiality or otherwise for mortal "Dasein" to exist "fully" enough that it might actually understand being. Heidegger is clear throughout the book that nothing makes certain that "Dasein" is capable of this understanding. Finally, this question of the authenticity of individual "Dasein" cannot be separated from the "historicality" of "Dasein". On the one hand, "Dasein", as mortal, is "stretched along" between birth and death, and thrown into its world, that is, thrown into its "possibilities", possibilities which "Dasein" is charged with the task of assuming. On the other hand, "Dasein's" access to
Robert Zimmer (philosopher) than a dozen languages (not yet in English). In 2010 he published a biography of Arthur Schopenhauer. He also translated a selection of essays by the 19th Century French critic and writer Charles Augustin Sainte-Beuve. Zimmer is a follower of Critical rationalism. Together with Martin Morgenstern he wrote a short and popular biography of Karl Popper and edited the correspondence between Karl Popper and Hans Albert. Robert Zimmer (philosopher) Robert Zimmer (born October 25, 1953 in Trier, Germany) is a German philosopher and essayist who writes biographies and popular introductions to philosophy and to the history of philosophy. Robert Zimmer