Description: A /\ identity. (Contributed by Anthony Hart, 22-Oct-2010)
Ref | Expression | ||
---|---|---|---|
Assertion | falantru | |- ( ( F. /\ T. ) <-> F. ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fal | |- -. F. |
|
2 | 1 | intnanr | |- -. ( F. /\ T. ) |
3 | 2 | bifal | |- ( ( F. /\ T. ) <-> F. ) |