Description: A triple syllogism inference. (Contributed by NM, 15-Oct-2005)
Ref | Expression | ||
---|---|---|---|
Hypotheses | syl3anb.1 | |
|
syl3anb.2 | |
||
syl3anb.3 | |
||
syl3anb.4 | |
||
Assertion | syl3anb | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | syl3anb.1 | |
|
2 | syl3anb.2 | |
|
3 | syl3anb.3 | |
|
4 | syl3anb.4 | |
|
5 | 1 2 3 | 3anbi123i | |
6 | 5 4 | sylbi | |