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fracus
They discuss people from the educated, democratized world see rectangles while a group from Namibia see circles because, they hypothesize, their world isn't highly "carpenterized" with right angles and straight lines. So could this not be simply because they don't know what a rectangle is, and so categorize these close loops as circles? I don't understand the acceptance it is an optical illusion.
_wire_ 

  ________
 /        \
 |        |
 \________/
Do you see the above as a circle or a rectangle?
chrsw
At first I saw rectangles then I searched for the circles and found them. Now I'm having a hard time going back to seeing rectangles.