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 Carl Sagan - Wikipedia  

 Atheism
#evidence  #cause  #subjects 

 The Book: On The Taboo Against Knowing Who You Are  

 Here is someone who has...
#cats  #head  #cause  #brain 

 Moreover, as the egg/chicken relation...
#death  #birth  #cause  #head  #neck 

 The Chicken And The Pig - Wikipedia, The Free Encyclopedia  

 Chicken and the pig fable
#eggs  #cause