(i) All tables are desks → UniversalAffirmative (A–type). (ii) Some controls are rules → ParticularAffirmative (I–type). (iii) No chair is a table → UniversalNegative (E–type). (iv) Some chairs are not tables →Particular Negative (O–type). (5) No chair is a table. All tables are desks. E + A ⇒O1–type of Conclusion“Some desks are not chairs.” All tables are desks. No desk is a paper. A + E ⇒ E–type of Conclusion“No table is a paper”. Venn diagrams of “Some desksare not chairs” :