Theorem id1 27342

Description: Alias for idALT 23 that may be referenced in some older works, and kept here to prevent broken links.

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(Contributed by NM, 30-Sep-1992.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
id1	|- ( ph -> ph )

Proof of Theorem id1

Step	Hyp	Ref	Expression
1		idALT 23	1 |- ( ph -> ph )

Syntax hints:   -> wi 4

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

This theorem is referenced by: (None)