Theorem an4l ≪ | index | src | ≫

theorem an4l (a b c d e: wff): $ a /\ b /\ c /\ d /\ e -> a $;

Step	Hyp	Ref	Expression
1		an3l	a /\ b /\ c /\ d -> a
2	1	anwl	a /\ b /\ c /\ d /\ e -> a

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp)