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Source: Contingencies Of Reinforcement: A Theoretical Analysis
                                    
                                        
                                        Contingencies of Reinforcement: A Theoretical Analysis (1969). 
Source: Contingencies Of Reinforcement: A Theoretical Analysis
                                    
                                        
                                        Dijkstra (1984)  The threats to computing science http://www.cs.utexas.edu/users/EWD/transcriptions/EWD08xx/EWD898.html (EWD898). 
1980s
                                    
“Because the machine will try to grind you into dust anyway, whether or not we speak.”
Source: Sister Outsider: Essays and Speeches
“Sometimes I don't know whether I'm real or whether I'm a character in one of my novels.”
Variant: Sometimes I don't know whether Zelda and I are real or just characters in one of my novels.
Source: The Shock of the New (1981), p. 17
Environmentalism as a Religion (2003)
 
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                        