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标题: [求助]feifei公共元素直推法的疑问 [打印本页]

作者: mucully    时间: 2009-3-4 15:35
标题: [求助]feifei公共元素直推法的疑问

Only if A, then
B.         B
A


    

Must by A, in
order to B.   B
A


    

If only A, then
B.         A
B


    

Not A, unless B.
         A
B


    

A, unless B.             
                    
                        
                            
                                
                                    
                                        
                                            
                                                
                                                    
                                                        
                                                            
                                                                
                                                                    
                                                                        
                                                                        

                                                                        
                                                                            
                                                                            

                                                                                
                                                                                
A,
                    
                    
B


    

A require B.             AB


    

A
depend/draw/base on B.  A
B


    



        


    

这些是从FF笔记里摘出来的,可是在下怎么也搞不明白为啥是这样的?真是知其然不知其所以然啊啊~~


    

请各位NN从逻辑的角度给点指点好不?谢谢~~~~~~~~~~~~~


作者: lirsn    时间: 2009-6-2 19:40
同问~~~~~~~




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