Description: Deduction adding a conjunct to antecedent. (Contributed by Glauco Siliprandi, 11-Dec-2019)
Ref | Expression | ||
---|---|---|---|
Hypothesis | 3adantll3.1 | ||
Assertion | 3adantll3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3adantll3.1 | ||
2 | simpll1 | ||
3 | simpll2 | ||
4 | 2 3 | jca | |
5 | simplr | ||
6 | simpr | ||
7 | 4 5 6 1 | syl21anc |