| ¬(band(s2i(sho1), bcompl(b2i(by2))) ∈short ∧ band(bcompl(s2i(sho1)), b2i(by2)) ∈short) ⊦ bor(band(s2i(sho1), bcompl(b2i(by2))), band(bcompl(s2i(sho1)), b2i(by2))) = s2i(i2s(bor(band(s2i(sho1), bcompl(b2i(by2))), band(bcompl(s2i(sho1)), b2i(by2))))) |
⊦ bor(band(s2i(sho1), bcompl(b2i(by2))), band(bcompl(s2i(sho1)), b2i(by2))) = s2i(i2s(bor(band(s2i(sho1), bcompl(b2i(by2))), band(bcompl(s2i(sho1)), b2i(by2))))), band(s2i(sho1), bcompl(b2i(by2))) ∈short ∧ band(bcompl(s2i(sho1)), b2i(by2)) ∈short