Description: Used to rederive the Tarski-Bernays-Wajsberg axioms from merco1 . (Contributed by Anthony Hart, 18-Sep-2011) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | merco1lem18 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | merco1 | |
|
2 | merco1lem17 | |
|
3 | 1 2 | ax-mp | |
4 | merco1lem17 | |
|
5 | 3 4 | ax-mp | |
6 | merco1lem5 | |
|
7 | merco1lem3 | |
|
8 | 6 7 | ax-mp | |
9 | merco1lem5 | |
|
10 | 8 9 | ax-mp | |
11 | merco1lem4 | |
|
12 | 10 11 | ax-mp | |
13 | merco1 | |
|
14 | merco1lem2 | |
|
15 | 13 14 | ax-mp | |
16 | 12 15 | ax-mp | |
17 | merco1lem9 | |
|
18 | 16 17 | ax-mp | |
19 | 5 18 | ax-mp | |