Statement: All desks are chairs. All chairs are tables. All tables are boxes. All boxes are trunks Conclusions: I. Some trunks are tables. II. All chairs are boxes. III. Some boxes are desks. IV. All desks are trunks.

All tables are boxes + All boxes are trunks = A + A = A = All tables are → trunks → conversion Some trunks are tables (I) Hence I follows. All chairs are tables + All tables are boxes = A + A = A = All chairs are boxes Hence II follows. All desks are chairs + All chairs are boxes = A + A = A = All desks are boxes → conversion → some boxes are desks (I) Hence III follows. All desks are boxes + All boxes are trunks = A + A = A = All desks are trunks Hence IV follows.