Theorem axi4 2728

Description: Specialization (intuitionistic logic axiom ax-4). This is just sp 2221 by another name. (Contributed by Jim Kingdon, 31-Dec-2017.) (New usage is discouraged.)

Assertion

Ref	Expression
axi4	⊢ (∀𝑥𝜑 → 𝜑)

Proof of Theorem axi4

Step	Hyp	Ref	Expression
1		sp 2221	1 ⊢ (∀𝑥𝜑 → 𝜑)

Syntax hints:   → wi 4  ∀wal 1561

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-12 2215

This theorem depends on definitions:  df-bi 210  df-ex 1803

This theorem is referenced by: (None)