| Step |
Hyp |
Ref |
Expression |
| 1 |
|
anass |
|
| 2 |
1
|
anbi1i |
|
| 3 |
|
anandi |
|
| 4 |
3
|
anbi1i |
|
| 5 |
4
|
anbi1i |
|
| 6 |
|
anass |
|
| 7 |
|
anass |
|
| 8 |
7
|
anbi1i |
|
| 9 |
|
ancom |
|
| 10 |
6 8 9
|
3bitr4ri |
|
| 11 |
|
ancom |
|
| 12 |
11
|
anbi1i |
|
| 13 |
|
anass |
|
| 14 |
|
ancom |
|
| 15 |
13 14
|
bitri |
|
| 16 |
10 12 15
|
3bitri |
|
| 17 |
2 5 16
|
3bitr4ri |
|
| 18 |
|
anass |
|
| 19 |
18
|
anbi1i |
|
| 20 |
|
an4 |
|
| 21 |
|
anass |
|
| 22 |
20 21
|
bitri |
|
| 23 |
22
|
anbi2i |
|
| 24 |
23
|
anbi1i |
|
| 25 |
17 19 24
|
3bitri |
|