Description: Step 28 of Meredith's proof of Lukasiewicz axioms from his sole axiom. (Contributed by NM, 14-Dec-2002) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | merlem12 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | merlem5 | ||
2 | merlem2 | ||
3 | 1 2 | ax-mp | |
4 | merlem4 | ||
5 | 3 4 | ax-mp | |
6 | merlem11 | ||
7 | 5 6 | ax-mp |