Theorem falantru 1398

Description: A /\ identity. (Contributed by David A. Wheeler, 23-Feb-2018.)

Assertion

Ref	Expression
falantru	|- ( ( F. /\ T. ) <-> F. )

Proof of Theorem falantru

Step	Hyp	Ref	Expression
1		simpl 108	. 2 |- ( ( F. /\ T. ) -> F. )
2		falim 1362	. 2 |- ( F. -> ( F. /\ T. ) )
3	1, 2	impbii 125	1 |- ( ( F. /\ T. ) <-> F. )

Syntax hints:   /\ wa 103   <-> wb 104   T. wtru 1349   F. wfal 1353

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610

This theorem depends on definitions:  df-bi 116  df-tru 1351  df-fal 1354

This theorem is referenced by:  trubifal  1411  falxortru  1416  falxorfal  1417