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In their effort of calling it a line they made it complicated to see. They should've just highlighted the zone or something.

• 80386 8y ago
  Here: https://i.imgur.com/IOenPsu.png https://i.imgur.com/IOenPsu.png
  • enriquto 8y ago
    But this image has less information. What about the boundary between south Italy and Greece, that are delimited by the blue line?
    • 80386 8y ago
      It doesn't exist. Southern Italy and Greece are both outside the Hajnal region.
      • enriquto 8y ago
        And then why is this boundary drawn on the wikipedia article?