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Source:  Great Islamic Encyclopedia website, 2016 https://www.cgie.org.ir/fa/news/154958
                                    
The Tragic Sense of Life (1913), II : The Starting-Point
                                        
                                        the necessary and sufficient conditions for rational knowledge 
Source:  Great Islamic Encyclopedia website, 2016 https://www.cgie.org.ir/fa/news/154958
                                    
“Is there any knowledge in the world which is so certain that no reasonable man could doubt it?”
Source: 1910s, The Problems of Philosophy (1912)
                                        
                                        Don Alvarez in Act I, Sc. 1; also misquoted as "Reason gains all people by compelling none." 
Alzira: A Tragedy (1736)
                                    
“There wasn’t even any reasoning. Secrecy was just a bureaucrats’ reflex.”
Source: Embassytown (2011), Chapter 22 (p. 276)
                                        
                                        On History. 
1820s, Critical and Miscellaneous Essays (1827–1855) 
Variant: What is all Knowledge too, but recorded Experience, and a product of History; of which, therefore, Reasoning and Belief, no less than Action and Passion, are essential materials.
                                    
Kant's Inaugural Dissertation (1770), Section II On The Distinction Between The Sensible And The Intelligible Generally
 
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                        