Theorem bj-ssbimi 32623

Description: Distribute substitution over implication. Uses only ax-1--5. (Contributed by BJ, 22-Dec-2020.)

Hypothesis

Ref	Expression
bj-ssbimi.1	|- ( ph -> ps )

Assertion

Ref	Expression
bj-ssbimi	|- ([ t/ x]b ph -> [ t/ x]b ps )

Proof of Theorem bj-ssbimi

Step	Hyp	Ref	Expression
1		bj-ssbim 32621	. 2 |- ( A. x ( ph -> ps ) -> ([ t/ x]b ph -> [ t/ x]b ps ) )
2		bj-ssbimi.1	. 2 |- ( ph -> ps )
3	1, 2	mpg 1724	1 |- ([ t/ x]b ph -> [ t/ x]b ps )

Syntax hints:   -> wi 4  [wssb 32619

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839

This theorem depends on definitions:  df-bi 197  df-ssb 32620

This theorem is referenced by: (None)