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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 ##££%%=»:.
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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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