On November 2, 2011
                
             
                  
                        
                           
                      
                                                                
                               
                               
                               
                                
                                                            Tight Couplings, Loose Couplings and the Knowable Unknown
			A couple of years ago I read The Black Swan and was so taken by the subject matter that I wrote a column about it.  The book had to do with the kinds of unknown issues that
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