Theorem exmidne 2974

Description: Excluded middle with equality and inequality. (Contributed by NM, 3-Feb-2012.) (Proof shortened by Wolf Lammen, 17-Nov-2019.)

Assertion

Ref	Expression
exmidne	⊢ (𝐴 = 𝐵 ∨ 𝐴 ≠ 𝐵)

Proof of Theorem exmidne

Step	Hyp	Ref	Expression
1		neqne 2972	. 2 ⊢ (¬ 𝐴 = 𝐵 → 𝐴 ≠ 𝐵)
2	1	orri 875	1 ⊢ (𝐴 = 𝐵 ∨ 𝐴 ≠ 𝐵)

Syntax hints:   ∨ wo 860   = wceq 1567   ≠ wne 2964

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 210  df-or 861  df-ne 2965

This theorem is referenced by:  elnn1uz2  12945  hashv01gt1  14377  numclwwlk3lem2lem  30671  fconst7v  32902  hashxpe  33089  drngmxidlr  33701  constrfin  34077  constrelextdg2  34078  subfacp1lem6  35572  tendoeq2  41433  ax6e2ndeqVD  45502  ax6e2ndeqALT  45524