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World Logic Day 14 January

• 082349872349872 4y ago
  cf https://pic.blog.plover.com/math/PM/1+1=2.png https://pic.blog.plover.com/math/PM/1+1=2.png (for more detail: https://blog.plover.com/math/PM.html https://blog.plover.com/math/PM.html )