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Definition df-fal 1202
Description: Definition of , a contradiction. is a constant false. (Contributed by Anthony Hart, 13-Oct-2010.)
Assertion
Ref Expression
df-fal ( ⊥ ↔ ¬ ⊤ )

Detailed syntax breakdown of Definition df-fal
StepHypRef Expression
1 wfal 1199 . 2 wff
2 wtru 1198 . . 3 wff
32wn 3 . 2 wff ¬ ⊤
41, 3wb 96 1 wff ( ⊥ ↔ ¬ ⊤ )
Colors of variables: wff set class
This definition is referenced by:  fal  1204  nottru  1236
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