| Step | Hyp | Ref
| Expression |
| 1 | | eqneqall 2805 |
. . . . 5


[ ]      |
| 2 | | tru 1487 |
. . . . . 6
 |
| 3 | 2 | a1i 11 |
. . . . 5

 |
| 4 | 1, 3 | 2thd 255 |
. . . 4

  [ ]   
  |
| 5 | | neeq1 2856 |
. . . . 5
 
   |
| 6 | | soeq2 5055 |
. . . . . 6
 [ ]
[ ]    |
| 7 | | unieq 4444 |
. . . . . . 7
     |
| 8 | | id 22 |
. . . . . . 7
   |
| 9 | 7, 8 | eleq12d 2695 |
. . . . . 6
  
    |
| 10 | 6, 9 | imbi12d 334 |
. . . . 5
  [ ] 

[ ]      |
| 11 | 5, 10 | imbi12d 334 |
. . . 4
   [ ]   

[ ]       |
| 12 | | neeq1 2856 |
. . . . 5
             |
| 13 | | soeq2 5055 |
. . . . . 6
     [ ] [ ]        |
| 14 | | unieq 4444 |
. . . . . . 7
             |
| 15 | | id 22 |
. . . . . . 7
           |
| 16 | 14, 15 | eleq12d 2695 |
. . . . . 6
      
            |
| 17 | 13, 16 | imbi12d 334 |
. . . . 5
      [ ]
 
[ ]                  |
| 18 | 12, 17 | imbi12d 334 |
. . . 4
      
[ ]   
     [ ]                   |
| 19 | | neeq1 2856 |
. . . . 5
 
   |
| 20 | | soeq2 5055 |
. . . . . 6
 [ ]
[ ]    |
| 21 | | unieq 4444 |
. . . . . . 7
     |
| 22 | | id 22 |
. . . . . . 7
   |
| 23 | 21, 22 | eleq12d 2695 |
. . . . . 6
  
    |
| 24 | 20, 23 | imbi12d 334 |
. . . . 5
  [ ] 

[ ]      |
| 25 | 19, 24 | imbi12d 334 |
. . . 4
   [ ]   

[ ]       |
| 26 | | vex 3203 |
. . . . . . . . . . . 12
 |
| 27 | 26 | unisn 4451 |
. . . . . . . . . . 11
    |
| 28 | | vsnid 4209 |
. . . . . . . . . . 11
   |
| 29 | 27, 28 | eqeltri 2697 |
. . . . . . . . . 10
      |
| 30 | | uneq1 3760 |
. . . . . . . . . . . . 13

          |
| 31 | | uncom 3757 |
. . . . . . . . . . . . . 14
         |
| 32 | | un0 3967 |
. . . . . . . . . . . . . 14
       |
| 33 | 31, 32 | eqtri 2644 |
. . . . . . . . . . . . 13
       |
| 34 | 30, 33 | syl6eq 2672 |
. . . . . . . . . . . 12

        |
| 35 | 34 | unieqd 4446 |
. . . . . . . . . . 11

          |
| 36 | 35, 34 | eleq12d 2695 |
. . . . . . . . . 10

         
        |
| 37 | 29, 36 | mpbiri 248 |
. . . . . . . . 9

           |
| 38 | 37 | a1d 25 |
. . . . . . . 8

  [ ]                |
| 39 | 38 | adantl 482 |
. . . . . . 7
   [ ]             [ ]                |
| 40 | | simpr 477 |
. . . . . . . 8
   [ ]             |
| 41 | | ssun1 3776 |
. . . . . . . . . 10
     |
| 42 | | simpl2 1065 |
. . . . . . . . . 10
   [ ]           [ ]       |
| 43 | | soss 5053 |
. . . . . . . . . 10
     [ ]     [ ]    |
| 44 | 41, 42, 43 | mpsyl 68 |
. . . . . . . . 9
   [ ]           [ ]   |
| 45 | | uniun 4456 |
. . . . . . . . . . . 12
            |
| 46 | 27 | uneq2i 3764 |
. . . . . . . . . . . 12
 
        |
| 47 | 45, 46 | eqtri 2644 |
. . . . . . . . . . 11
         |
| 48 | | simprr 796 |
. . . . . . . . . . . 12
   [ ]           
 
   |
| 49 | | simpl2 1065 |
. . . . . . . . . . . . 13
   [ ]           
 
[ ]       |
| 50 | | elun1 3780 |
. . . . . . . . . . . . . 14
 
       |
| 51 | 50 | ad2antll 765 |
. . . . . . . . . . . . 13
   [ ]           
 
       |
| 52 | | ssun2 3777 |
. . . . . . . . . . . . . . 15
 
     |
| 53 | 52, 28 | sselii 3600 |
. . . . . . . . . . . . . 14
     |
| 54 | 53 | a1i 11 |
. . . . . . . . . . . . 13
   [ ]           
 
      |
| 55 | | sorpssi 6943 |
. . . . . . . . . . . . 13
 [ ]          
       
    |
| 56 | 49, 51, 54, 55 | syl12anc 1324 |
. . . . . . . . . . . 12
   [ ]           
 
      |
| 57 | | ssequn1 3783 |
. . . . . . . . . . . . . . 15
 
 
   |
| 58 | 53 | a1i 11 |
. . . . . . . . . . . . . . . 16
 
      |
| 59 | | eleq1 2689 |
. . . . . . . . . . . . . . . 16
           
       |
| 60 | 58, 59 | syl5ibr 236 |
. . . . . . . . . . . . . . 15
     
 
        |
| 61 | 57, 60 | sylbi 207 |
. . . . . . . . . . . . . 14
   
          |
| 62 | 61 | impcom 446 |
. . . . . . . . . . . . 13
      
       |
| 63 | | uncom 3757 |
. . . . . . . . . . . . . 14
 
     |
| 64 | | ssequn1 3783 |
. . . . . . . . . . . . . . . 16
 
      |
| 65 | | eleq1 2689 |
. . . . . . . . . . . . . . . . 17
            
        |
| 66 | 50, 65 | syl5ibr 236 |
. . . . . . . . . . . . . . . 16
      
          |
| 67 | 64, 66 | sylbi 207 |
. . . . . . . . . . . . . . 15
   
          |
| 68 | 67 | impcom 446 |
. . . . . . . . . . . . . 14
    
         |
| 69 | 63, 68 | syl5eqel 2705 |
. . . . . . . . . . . . 13
    
 
       |
| 70 | 62, 69 | jaodan 826 |
. . . . . . . . . . . 12
                 |
| 71 | 48, 56, 70 | syl2anc 693 |
. . . . . . . . . . 11
   [ ]           
 
 
       |
| 72 | 47, 71 | syl5eqel 2705 |
. . . . . . . . . 10
   [ ]           
 
           |
| 73 | 72 | expr 643 |
. . . . . . . . 9
   [ ]            
            |
| 74 | 44, 73 | embantd 59 |
. . . . . . . 8
   [ ]            [ ] 

            |
| 75 | 40, 74 | embantd 59 |
. . . . . . 7
   [ ]             [ ]                |
| 76 | 39, 75 | pm2.61dane 2881 |
. . . . . 6
  [ ]            [ ]                |
| 77 | 76 | 3exp 1264 |
. . . . 5
 [ ]            [ ]                  |
| 78 | 77 | com24 95 |
. . . 4
   [ ]        
[ ]                   |
| 79 | 4, 11, 18, 25, 2, 78 | findcard2 8200 |
. . 3
 
[ ]      |
| 80 | 79 | com12 32 |
. 2


[ ]      |
| 81 | 80 | 3imp 1256 |
1
 
[ ] 
   |