Theorem ax11dgen 2008

Description: Degenerate instance of ax-11 2034 where bundled variables x and y have a common substitution. Uses only Tarski's FOL axiom schemes. (Contributed by NM, 13-Apr-2017.)

Assertion

Ref	Expression
ax11dgen	|- ( A. x A. x ph -> A. x A. x ph )

Proof of Theorem ax11dgen

Step	Hyp	Ref	Expression
1		id 22	1 |- ( A. x A. x ph -> A. x A. x ph )

Syntax hints:   -> wi 4   A.wal 1481

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7

This theorem is referenced by: (None)