⊦ ∃ rs, f, g. Ha = mk(rs, f, g)
mk(rs, f, g) = Ha0 ∪ Ha, a[P1](Ha), a[P0](Ha0), Ha0 ⊥ Ha, ∃ rs, f, g. Ha0 = mk(rs, f, g) ⊦ a[P0 * P1](mk(rs, f, g))
Used terms: Ha0