¨¨¨¨~%**##                                          ##**%~¨¨¨¨
¨¨::~%%##@                                          @##%%~::¨¨
¨¨¨¨¨~~%%#                                          #%%~~¨¨¨¨¨
¨:~:%*@###                                          ###@*%:~:¨
¨:~:%*#@##                                          ##@#*%:~:¨
¨¨::~~~%##                                     ¨    ##%~~~::¨¨
¨¨¨¨¨:::%#                                        ¨ #%:::¨¨¨¨¨
¨¨¨¨¨¨~%##                                    ¨ :¨  ##%~¨¨¨¨¨¨
¨:~:%*#@## gull call.                    ¨      ¨ : ##@#*%:~:¨
¨:~:%*#@## ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ##@#*%:~:¨
¨:~:%*#@@#                                          #@@#*%:~:¨
¨:~:%*#@## the seagull is  a  metaphysics  trick; a ##@#*%:~:¨
¨:~:%*#@## world-builder's  shortcut,  to define  a ##@#*%:~:¨
¨¨¨¨¨~%*## section  of reality  and imply its size: ##*%~¨¨¨¨¨
¨:~:%%%%*@ place  a flock of birds at the  edge and @*%%%%:~:¨
¨¨¨¨~~%*@# make  their  calls  tesselate  over  the #@*%~~¨¨¨¨
¨¨¨¨:~~%#@ entire volume                            @#%~~:¨¨¨¨
¨:~:%*####                                          ####*%:~:¨
¨:~:%**### a  seagull can be  defined by  as little ###**%:~:¨
¨:~:::%##@ as  five  vertices;  six  triangles.  (i @##%:::~:¨
¨:~:%%%### would recommend  handling in  swarms  of ###%%%:~:¨
¨:~:%*#@## at least a dozen birds.)                 ##@#*%:~:¨
¨:~:%*#@##                                          ##@#*%:~:¨
¨¨¨::::*##                                          ##*::::¨¨¨
¨:~:%**###                                          ###**%:~:¨
¨¨¨~::%###                                          ###%::~¨¨¨
¨::::::%#@                                          @#%::::::¨