Theorem nesymir 2383

Description: Inference associated with nesym 2381. (Contributed by BJ, 7-Jul-2018.)

Hypothesis

Ref	Expression
nesymir.1	|- -. A = B

Assertion

Ref	Expression
nesymir	|- B =/= A

Proof of Theorem nesymir

Step	Hyp	Ref	Expression
1		nesymir.1	. 2 |- -. A = B
2		nesym 2381	. 2 |- ( B =/= A <-> -. A = B )
3	1, 2	mpbir 145	1 |- B =/= A

Syntax hints:   -. wn 3   = wceq 1343   =/= wne 2336

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 604  ax-in2 605  ax-5 1435  ax-gen 1437  ax-ext 2147

This theorem depends on definitions:  df-bi 116  df-cleq 2158  df-ne 2337

This theorem is referenced by: (None)