The "structure" of this is the subject of a book by W. H. Newton-Smith, which discusses Peirce's argument about a limit of this and constraints on logical possibility.  It is the second title thing in a book by Richard Swinburne, which argues that it has of logical necessity a unique topology.  The "unreality" of this was asserted in a famous article by J. M. E. McTaggart, who divided it into a so-called "A" and "B" series to prove that it doesn't exist.  In his Confessi
The "structure" of this is the subject of a book by W. H. Newton-Smith, which discusses Peirce's argument about a limit of this and constraints on logical possibility.  It is the second title thing in a book by Richard Swinburne, which argues that it has of logical necessity a unique topology.  The "unreality" of this was asserted in a famous article by J. M. E. McTaggart, who divided it into a so-called "A" and "B" series to prove that it doesn't exist.  In his Confessions, Augustine claimed that when no one asks him what it is, he knows, but when someone asks him he doesn't know.  FTP, identify this concept which is paired with "free will" in a book by Henri Bergson and with "Being" in the title of a book by Martin Heidegger.
The "structure" of this is the subject of a book by W. H. Newton-Smith, which discusses Peirce's argument about a limit of this and constraints on logical possibility.  
time