Theorem naim1i

Description: Constructor rule for -/\ . (Contributed by Anthony Hart, 2-Sep-2011)

	Ref	Expression
Hypotheses	naim1i.1	|- ( ph -> ps )
	naim1i.2	|- ( ps -/\ ch )
Assertion	naim1i	|- ( ph -/\ ch )

Proof

Step	Hyp	Ref	Expression
1		naim1i.1	|- ( ph -> ps )
2		naim1i.2	|- ( ps -/\ ch )
3		naim1	|- ( ( ph -> ps ) -> ( ( ps -/\ ch ) -> ( ph -/\ ch ) ) )
4	1 2 3	mp2	|- ( ph -/\ ch )