Description: A mixed syllogism inference from two biconditionals. (Contributed by BJ, 21-Apr-2019)
Ref | Expression | ||
---|---|---|---|
Hypotheses | sylbb1.1 | ||
sylbb1.2 | |||
Assertion | sylbb1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylbb1.1 | ||
2 | sylbb1.2 | ||
3 | 1 | biimpri | |
4 | 3 2 | sylib |