P0(H2), P1(H), P2(H0), H0 ⊥ H2, H2 ⊥ H, H0 ⊥ H ⊦ ((P0 * P1 * P2))(H2 ∪ H ∪ H0), ((P1 * P2))(H ∪ H0) ∧ H2 ⊥ H ∪ H0