Theorem a1tru 1411

Description: Anything implies . (Contributed by FL, 20-Mar-2011.) (Proof shortened by Anthony Hart, 1-Aug-2011.)

Assertion

Ref	Expression
a1tru

Proof of Theorem a1tru

Step	Hyp	Ref	Expression
1		tru 1399	. 2
2	1	a1i 11	1

Syntax hints:  ->wi 4  wtru 1396

This theorem is referenced by:  truanOLD  1413  disjprg  4448  euotd  4753  elabrex  6155  riota5f  6282  ac6s6  30580  elabrexg  31430  lhpexle1  35732

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 185  df-tru 1398