Description: Inference disjoining the antecedents of two implications. (Contributed by NM, 23-Oct-2005)
Ref | Expression | ||
---|---|---|---|
Hypotheses | jaoian.1 | |
|
jaoian.2 | |
||
Assertion | jaoian | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | jaoian.1 | |
|
2 | jaoian.2 | |
|
3 | 1 | ex | |
4 | 2 | ex | |
5 | 3 4 | jaoi | |
6 | 5 | imp | |