Theorem anim2d | index | src |

theorem anim2d (a b c d: wff): $ a -> c -> d $ > $ a -> b /\ c -> b /\ d $;
StepHypRefExpression
1 idd
a -> b -> b
2 hyp h
a -> c -> d
3 1, 2 animd
a -> b /\ c -> b /\ d

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp)