| We 
            will then have the following choices considering the criterion of 
            neatness of pattern. | 
        
         
           
             
              
                 
                
                   
                     
                      
                         
                          |  
                             1)  
                           | 
                           
                            
                           | 
                           
                            
                           | 
                           
                             h 
                               
                           | 
                           
                             s 
                           | 
                         
                         
                          |  
                             2)  
                           | 
                           
                             c 
                           | 
                           
                             j 
                           | 
                           
                             s 
                           | 
                           
                            
                           | 
                         
                         
                          |  
                             3)  
                           | 
                           
                             c 
                           | 
                           
                             j  
                           | 
                           
                             ch  
                           | 
                           
                             s 
                           | 
                         
                       
                     | 
                   
                 
                 
              
             
           | 
        
         
          | Of these three, (1) 
            and (3) are more probable since they pattern with the stops which 
            have a set of voiceless, voiced and aspirated phonemes. With no valid 
            reason for prefering one of these two, the first set is arbitrarily 
            chosen for the present analysis. Nevertheless the free variation, 
            especially the four way one, defies a neat description under the structural 
            model. | 
        
         
          | We shall now analyse 
            the data in the framework of generative phonology. We shall have /c/, 
            /j and /ch/ or /c&/, 
            /j&/ 
            and /c&h/ 
            as the underlying segments on the model of the stops. If we choose 
            the first set, there must be a Palatalisation rule to change the alveolar 
            affricates into their respective palatal affricates. This rule will 
            apply obligatorily before front vowels (thus accounting for the only 
            occurrence of palatals in this environment) and will apply optionally 
            before non-front vowels(thus accounting for the only occurrence of 
            both alveolars and palatals in this environment). This has a theoretical 
            implication. This claims that a phonological rule can be partially 
            optional, i.e., a rule can be optional in certain environments and 
            obligatory in certain other environments. Until we get further proof 
            to validate this claim, this rule can only be provisional. | 
        
         
          | So we shall take the 
            second set, i.e., the palatal series as the underlying segments. Then 
            there must be an Alveolarization  rule 
            which changes the palatal affricates into their respective alveolar 
            affricates before non-front vowels. This rule will apply optionally. 
            It may be stated as follows: | 
        
         
          | Alveolarization Rule: | 
        
         
           
             
              
                 
                
                   
                     
                      
                         
                          |  
                             Opt. 
                               
                           | 
                           
                             [+cons.] 
                              [ ] [ ] 
                           | 
                           
                             Opt. [+high 
                              ] ® [ -high ] in 
                           | 
                           
                             env.__ 
                              [+voc. ] 
                           | 
                           
                             [-back 
                              ] [+cor ] [ ] 
                           | 
                         
                       
                     | 
                   
                 
                 
              
             
           | 
        
         
          | There must also be 
            a Deocclusion rule in this language which changes the voiceless aspired 
            alveolar and palatal affricates / ch / and / c&h 
            / into / s / and / s& 
            / respectively. This will also be an optional rule and will optional 
            rule and will operate after the alveolarisation rule. It may be stated 
            as follows: | 
        
         
          | Deocclusion Rule: | 
        
         
           
             
              
                 
                
                   
                     
                      
                         
                          |  
                            
                           | 
                           
                             [-cont. 
                              ] [ ] 
                           | 
                           
                            
                           | 
                           
                            
                           | 
                         
                         
                          |  
                            
                           | 
                           
                             [-nasal 
                              ] 
                           | 
                           
                            
                           | 
                           
                            
                           | 
                         
                         
                          |  
                             Opt. 
                           | 
                           
                             [-abr. 
                              rel. ] [ ] 
                           | 
                           
                             ® 
                           | 
                           
                             [ 
                              +cont. ]  
                           | 
                         
                         
                          |  
                            
                           | 
                           
                             [+asp. 
                              ] 
                           | 
                           
                            
                           | 
                           
                            
                           | 
                         
                       
                     | 
                   
                 
                 
              
             
           | 
        
         
          Let us see now how 
            we get all the surface forms with these two optional rules. When the 
            Alveolarisation rule operates on /   /, /   
            / and /  h 
            / before non-front vowels, we will get [ c ], [ j ] and [ ch ] respectively 
            before non-front vowels. The optionality of this rule will explain 
            why we have free variation between [ c ] and [   
            ], [ j ] and [  ] 
            and [ ch ] and [ c&h] 
            before non-front vowels. When the Alveolarisation rule has applied 
            and the Deocuulusion rule applies to its output / ch /, we will get 
            [ s]. When the Alveolarisation rule hasnt |