RBOX: TBOX: INCLUSION(E, FORALL(R, FORALL(R, !A || !{a}))) INCLUSION(E, FORALL(R, FORALL(R, !B || !{a}))) INCLUSION(E, FORALL(R, FORALL(R, !C || !E))) INCLUSION(E, FORALL(R, FORALL(R, !D || !E))) ABOX: a : EXISTS(R, EXISTS(R, {a} && E)) a : A || B || C || D END