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###,#,,#,, gull call.                    ,      , : #,##,,,,,,
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#,###,#,## 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                            #,,,,,###,
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#,#,,,###, 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.)                 #,#,,##,,#
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