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==Common conventions==
==Common conventions==
*Blue is superior and green is inferior. ''The sky is blue and the grass is green''.
*Blue is superior and green is inferior. Why? ''The sky is blue and the grass is green''.
*Green is right and left is red. Why? ''Planes and ships have green right and red left''.
**The above can be remembered by sailors that drink [[Wikipedia:Port wine|port wine]] with ''no red port left''; red is port.


==See also==
==See also==
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