Description: A negated syllogism inference. (Contributed by NM, 26-Jun-1994) (Proof shortened by Wolf Lammen, 14-Nov-2023)
Ref | Expression | ||
---|---|---|---|
Hypotheses | nsyl2.1 | |
|
nsyl2.2 | |
||
Assertion | nsyl2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nsyl2.1 | |
|
2 | nsyl2.2 | |
|
3 | 1 2 | nsyl3 | |
4 | 3 | con4i | |