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Theorem neir 2258
Description: Inference associated with df-ne 2256. (Contributed by BJ, 7-Jul-2018.)
Hypothesis
Ref Expression
neir.1 ¬ 𝐴 = 𝐵
Assertion
Ref Expression
neir 𝐴𝐵

Proof of Theorem neir
StepHypRef Expression
1 neir.1 . 2 ¬ 𝐴 = 𝐵
2 df-ne 2256 . 2 (𝐴𝐵 ↔ ¬ 𝐴 = 𝐵)
31, 2mpbir 144 1 𝐴𝐵
Colors of variables: wff set class
Syntax hints:  ¬ wn 3   = wceq 1289  wne 2255
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106
This theorem depends on definitions:  df-bi 115  df-ne 2256
This theorem is referenced by:  ine0  7851
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