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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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