( [#] L is directed & RelStr(# the carrier of L,the InternalRel of L #) = RelStr(# the carrier of (L +id ),the InternalRel of (L +id ) #) ) by Def5, WAYBEL_0:def 6;
hence [#] (L +id ) is directed by WAYBEL_0:3; :: according to WAYBEL_0:def 6 :: thesis: verum