The first main line of argument develops analyses for the species named above and discusses their existence against the touchstone of classic puzzles, such as that of the ship of Theseus. The second main line of argument starts from the discussions of four-dimensionalism and the problem of vagueness to reject the views that the formation of complex structures under any particular conditions is either given or not given.
Hübner introduces a current international debate to German readers.
Johannes Hübner, Ludwig-Maximilians-Universität München.