Description: Deduction adding a conjunct to antecedent. (Contributed by Glauco Siliprandi, 11-Dec-2019)
Ref | Expression | ||
---|---|---|---|
Hypothesis | 3adantll2.1 | |
|
Assertion | 3adantll2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3adantll2.1 | |
|
2 | simpll1 | |
|
3 | simpll3 | |
|
4 | 2 3 | jca | |
5 | simplr | |
|
6 | simpr | |
|
7 | 4 5 6 1 | syl21anc | |