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 |
|