Theorem syl3anl3 1219

Description: A syllogism inference. (Contributed by NM, 24-Feb-2005.)

Hypotheses

Ref	Expression
syl3anl3.1	|- ( ph -> th )
syl3anl3.2	|- ( ( ( ps /\ ch /\ th ) /\ ta ) -> et )

Assertion

Ref	Expression
syl3anl3	|- ( ( ( ps /\ ch /\ ph ) /\ ta ) -> et )

Proof of Theorem syl3anl3

Step	Hyp	Ref	Expression
1		syl3anl3.1	. . 3 |- ( ph -> th )
2	1	3anim3i 1126	. 2 |- ( ( ps /\ ch /\ ph ) -> ( ps /\ ch /\ th ) )
3		syl3anl3.2	. 2 |- ( ( ( ps /\ ch /\ th ) /\ ta ) -> et )
4	2, 3	sylan 277	1 |- ( ( ( ps /\ ch /\ ph ) /\ ta ) -> et )

Syntax hints:   -> wi 4   /\ wa 102   /\ w3a 919

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106

This theorem depends on definitions:  df-bi 115  df-3an 921

This theorem is referenced by: (None)