| Step | Hyp | Ref
 | Expression | 
| 1 |   | opabssxp 4737 | 
. . 3
                       
      
            
     | 
| 2 | 1 | a1i 9 | 
. 2
       
      
  DECID
                             
      
            
      | 
| 3 |   | neirr 2376 | 
. . . . . 6
          | 
| 4 |   | df-br 4034 | 
. . . . . . 7
             
             
      
        
      
                       
      
         | 
| 5 |   | neeq1 2380 | 
. . . . . . . . 9
                   
        | 
| 6 |   | neeq2 2381 | 
. . . . . . . . 9
                   
        | 
| 7 | 5, 6 | opelopab2 4305 | 
. . . . . . . 8
               
                                    
      
         
        | 
| 8 | 7 | anidms 397 | 
. . . . . . 7
                              
             
      
       
        | 
| 9 | 4, 8 | bitrid 192 | 
. . . . . 6
                                  
      
                   | 
| 10 | 3, 9 | mtbiri 676 | 
. . . . 5
                       
             
      
        | 
| 11 | 10 | rgen 2550 | 
. . . 4
        
            
             
      
       | 
| 12 | 11 | a1i 9 | 
. . 3
       
      
  DECID
                                       
      
          | 
| 13 |   | df-br 4034 | 
. . . . . . . 8
             
             
      
        
      
                       
      
         | 
| 14 |   | neeq2 2381 | 
. . . . . . . . 9
                   
        | 
| 15 | 5, 14 | opelopab2 4305 | 
. . . . . . . 8
               
                                    
      
         
        | 
| 16 | 13, 15 | bitrid 192 | 
. . . . . . 7
               
                            
      
                   | 
| 17 |   | df-br 4034 | 
. . . . . . . 8
             
             
      
        
      
                       
      
         | 
| 18 |   | neeq1 2380 | 
. . . . . . . . . . 11
                   
        | 
| 19 |   | neeq2 2381 | 
. . . . . . . . . . 11
                   
        | 
| 20 | 18, 19 | opelopab2 4305 | 
. . . . . . . . . 10
               
                                    
      
         
        | 
| 21 | 20 | ancoms 268 | 
. . . . . . . . 9
               
                                    
      
         
        | 
| 22 |   | necom 2451 | 
. . . . . . . . 9
          
       | 
| 23 | 21, 22 | bitrdi 196 | 
. . . . . . . 8
               
                                    
      
         
        | 
| 24 | 17, 23 | bitrid 192 | 
. . . . . . 7
               
                            
      
                   | 
| 25 | 16, 24 | bitr4d 191 | 
. . . . . 6
               
                            
      
                                 
      
           | 
| 26 | 25 | biimpd 144 | 
. . . . 5
               
                            
      
                                 
      
           | 
| 27 | 26 | rgen2 2583 | 
. . . 4
        
      
           
             
      
                               
      
          | 
| 28 | 27 | a1i 9 | 
. . 3
       
      
  DECID
                 
                           
      
                                 
      
           | 
| 29 | 12, 28 | jca 306 | 
. 2
       
      
  DECID
               
            
             
      
                    
                         
      
                                 
      
            | 
| 30 | 16 | 3adant3 1019 | 
. . . . . 6
               
       
                            
      
                   | 
| 31 | 30 | adantl 277 | 
. . . . 5
             
    DECID      
              
       
     
           
             
      
        
        | 
| 32 |   | simpr 110 | 
. . . . . . . . . . 11
            
      
DECID  
                
       
                                 | 
| 33 |   | simplr 528 | 
. . . . . . . . . . 11
            
      
DECID  
                
       
                                 | 
| 34 | 32, 33 | eqnetrrd 2393 | 
. . . . . . . . . 10
            
      
DECID  
                
       
                                 | 
| 35 | 34 | necomd 2453 | 
. . . . . . . . 9
            
      
DECID  
                
       
                                 | 
| 36 | 35 | olcd 735 | 
. . . . . . . 8
            
      
DECID  
                
       
                                    
      | 
| 37 |   | simpr 110 | 
. . . . . . . . . 10
            
      
DECID  
                
       
                      
              | 
| 38 | 37 | neqned 2374 | 
. . . . . . . . 9
            
      
DECID  
                
       
                      
            | 
| 39 | 38 | orcd 734 | 
. . . . . . . 8
            
      
DECID  
                
       
                      
               
      | 
| 40 |   | equequ2 1727 | 
. . . . . . . . . . 11
                   
        | 
| 41 | 40 | dcbid 839 | 
. . . . . . . . . 10
            DECID      
  DECID    
    | 
| 42 |   | equequ1 1726 | 
. . . . . . . . . . . . 13
                   
        | 
| 43 | 42 | dcbid 839 | 
. . . . . . . . . . . 12
            DECID      
  DECID    
    | 
| 44 | 43 | ralbidv 2497 | 
. . . . . . . . . . 11
              
    DECID      
         DECID         | 
| 45 |   | simpll 527 | 
. . . . . . . . . . 11
                   DECID                   
       
                       
      
DECID  
     | 
| 46 |   | simplr1 1041 | 
. . . . . . . . . . 11
                   DECID                   
       
                        | 
| 47 | 44, 45, 46 | rspcdva 2873 | 
. . . . . . . . . 10
                   DECID                   
       
                       
DECID  
     | 
| 48 |   | simplr3 1043 | 
. . . . . . . . . 10
                   DECID                   
       
                        | 
| 49 | 41, 47, 48 | rspcdva 2873 | 
. . . . . . . . 9
                   DECID                   
       
                
DECID  
     | 
| 50 |   | exmiddc 837 | 
. . . . . . . . 9
   DECID        
      
       
    | 
| 51 | 49, 50 | syl 14 | 
. . . . . . . 8
                   DECID                   
       
                                    | 
| 52 | 36, 39, 51 | mpjaodan 799 | 
. . . . . . 7
                   DECID                   
       
                                  | 
| 53 |   | df-br 4034 | 
. . . . . . . . . 10
             
             
      
        
      
                       
      
         | 
| 54 |   | neeq2 2381 | 
. . . . . . . . . . . 12
                   
        | 
| 55 | 5, 54 | opelopab2 4305 | 
. . . . . . . . . . 11
               
                                    
      
         
        | 
| 56 | 55 | 3adant2 1018 | 
. . . . . . . . . 10
               
       
                                    
      
         
        | 
| 57 | 53, 56 | bitrid 192 | 
. . . . . . . . 9
               
       
                            
      
                   | 
| 58 |   | df-br 4034 | 
. . . . . . . . . 10
             
             
      
        
      
                       
      
         | 
| 59 |   | neeq2 2381 | 
. . . . . . . . . . . 12
                   
        | 
| 60 | 18, 59 | opelopab2 4305 | 
. . . . . . . . . . 11
               
                                    
      
         
        | 
| 61 | 60 | 3adant1 1017 | 
. . . . . . . . . 10
               
       
                                    
      
         
        | 
| 62 | 58, 61 | bitrid 192 | 
. . . . . . . . 9
               
       
                            
      
                   | 
| 63 | 57, 62 | orbi12d 794 | 
. . . . . . . 8
               
       
                                                                      
      
                              | 
| 64 | 63 | ad2antlr 489 | 
. . . . . . 7
                   DECID                   
       
                                         
      
                                 
      
                              | 
| 65 | 52, 64 | mpbird 167 | 
. . . . . 6
                   DECID                   
       
                                        
      
                                 
      
           | 
| 66 | 65 | ex 115 | 
. . . . 5
             
    DECID      
              
       
     
      
             
             
      
                               
      
            | 
| 67 | 31, 66 | sylbid 150 | 
. . . 4
             
    DECID      
              
       
     
           
             
      
                                
      
                                 
      
            | 
| 68 | 67 | ralrimivvva 2580 | 
. . 3
       
      
  DECID
                 
      
                           
      
                                                                           
      
            | 
| 69 | 16 | notbid 668 | 
. . . . . . 7
               
                                                    
      | 
| 70 |   | df-ne 2368 | 
. . . . . . . 8
          
         | 
| 71 | 70 | notbii 669 | 
. . . . . . 7
            
           | 
| 72 | 69, 71 | bitrdi 196 | 
. . . . . 6
               
                                                             | 
| 73 | 72 | adantl 277 | 
. . . . 5
             
    DECID      
              
     
             
             
      
        
            | 
| 74 |   | equequ2 1727 | 
. . . . . . . 8
                   
        | 
| 75 | 74 | dcbid 839 | 
. . . . . . 7
            DECID      
  DECID    
    | 
| 76 |   | simpl 109 | 
. . . . . . . 8
             
    DECID      
              
     
      
      
DECID  
     | 
| 77 |   | simprl 529 | 
. . . . . . . 8
             
    DECID      
              
     
       | 
| 78 | 44, 76, 77 | rspcdva 2873 | 
. . . . . . 7
             
    DECID      
              
     
      
DECID  
     | 
| 79 |   | simprr 531 | 
. . . . . . 7
             
    DECID      
              
     
       | 
| 80 | 75, 78, 79 | rspcdva 2873 | 
. . . . . 6
             
    DECID      
              
     
DECID  
     | 
| 81 |   | notnotrdc 844 | 
. . . . . 6
   DECID        
      
              | 
| 82 | 80, 81 | syl 14 | 
. . . . 5
             
    DECID      
              
     
      
              | 
| 83 | 73, 82 | sylbid 150 | 
. . . 4
             
    DECID      
              
     
             
             
      
                 | 
| 84 | 83 | ralrimivva 2579 | 
. . 3
       
      
  DECID
                 
      
                                                 | 
| 85 | 68, 84 | jca 306 | 
. 2
       
      
  DECID
               
      
      
           
             
      
                                
      
                                 
      
                 
      
                           
      
                    | 
| 86 |   | dftap2 7318 | 
. 2
                                        TAp               
             
      
                                                  
      
                                                                                         
      
                
      
      
                           
      
                                                                           
      
                 
      
                           
      
                     | 
| 87 | 2, 29, 85, 86 | syl3anbrc 1183 | 
1
       
      
  DECID
                             
      
        TAp    |