,@,,@@,,@,                                          @,@@,@,@,@
,@,@,@,@@,                                          @,,@,@,@,@
,@,@,@,,@,                                          @,@@,@,@,@
,@,@,@,@@,                                          @,,@,@,@,@
,@,@,@,,@,                                          @,@@,@,@,@
,@,@,@,@@,                                     ,    @,,@,@,@,@
,@,@,@,,@,                                        , @,@@,@,@,@
,@,@,@,@@,                                    , .,  @,,@,@,@,@
,@,@,@,,@, 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.)                 @,,@,@,@,@
,@,@,@,,@,                                          @,@@,@,@,@
,@,@,@,@@,                                          @,,@,@,@,@
,@,@,@,,@,                                          @,@@,@,@,@
,@,@,@,@@,                                          @,,@,@,@,@
,@,@,@,,@,                                          @,@@,@,@,@