What is a clear sign of intelligence that a few notice?

 https://www.quora.com/What-is-a-clear-sign-of-intelligence-that-a-few-notice/answer/Mr-Shelby-35?ch=8&oid=1477743697850670&share=0fe64d3d&srid=5UWKP&target_type=answer

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"The best way to predict the future is to create it." Abraham Lincoln

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