Description: An inference from an inequality, related to modus tollens. (Contributed by NM, 13-Apr-2007)
Ref | Expression | ||
---|---|---|---|
Hypotheses | nemtbir.1 | |
|
nemtbir.2 | |
||
Assertion | nemtbir | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nemtbir.1 | |
|
2 | nemtbir.2 | |
|
3 | 1 | neii | |
4 | 3 2 | mtbir | |