Description: The theorem form of the deduction dtrucor leads to a contradiction, as mentioned in the "Wrong!" example at mmdeduction.html#bad . Usage of this theorem is discouraged because it depends on ax-13 . (Contributed by NM, 20-Oct-2007) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypothesis | dtrucor2.1 | |
|
Assertion | dtrucor2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dtrucor2.1 | |
|
2 | ax6e | |
|
3 | 1 | necon2bi | |
4 | pm2.01 | |
|
5 | 3 4 | ax-mp | |
6 | 5 | nex | |
7 | 2 6 | pm2.24ii | |