(11-15) : (i) All stories are fictions →Universal Affirmative (Atype). (ii) Some books are stories →Particular Affirmative (I type). (iii)No desk is sofa set → Universal Negative (E-type). (iv) Some desks are not sofa sets → Particular Negative (O-type). (5) Some books are stories All stories are fictions. I + A ⇒ I-type of Conclusion “Some books are fictions.” Some books are fictions All fictions are poems I + A ⇒ I-type of Conclusion“Some books are poems.” Conclusion I is Converse of this Conclusion. All stories are fictions. All fictions are poems A + A ⇒ A-type of Conclusion“All stories are poems.” This is Conclusion II.