Theorem exmidne 2939

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 2937	. 2 ⊢ (¬ 𝐴 = 𝐵 → 𝐴 ≠ 𝐵)
2	1	orri 862	1 ⊢ (𝐴 = 𝐵 ∨ 𝐴 ≠ 𝐵)

Syntax hints:   ∨ wo 847   = wceq 1541   ≠ wne 2929

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 207  df-or 848  df-ne 2930

This theorem is referenced by:  elnn1uz2  12829  hashv01gt1  14259  numclwwlk3lem2lem  30384  fconst7v  32624  hashxpe  32815  drngmxidlr  33487  constrfin  33831  constrelextdg2  33832  subfacp1lem6  35301  tendoeq2  40946  ax6e2ndeqVD  45065  ax6e2ndeqALT  45087