Note 321 — Chapter I
Reading edition
By the contraposition of both premisses this reasoning is reduced to the valid syllogistic form, All not-M is not-P, All not-M is not-S, therefore, Some not-S is not-P.
Reading edition
By the contraposition of both premisses this reasoning is reduced to the valid syllogistic form, All not-M is not-P, All not-M is not-S, therefore, Some not-S is not-P.