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I wonder if, in fact, we have been observed by aliens and upon close examination of human conduct and human behavior they have concluded that there is no sign of intelligent life on Earth.

"Neil deGrasse Tyson Says Aliens Might Find Humans Too Stupid To Contact" By Meredith Bennett-Smith, www.huffingtonpost.com. July 17, 2013.
I wonder if, in fact, we have been observed by aliens and upon close examination of human conduct and human behavior they have concluded that there is no sign of intelligent life on Earth.