Objects whose type is a subtype of "Printable | Drawable" (union) are those that implement either interface. For "Printable & Drawable" (intersection), you have

Objects whose type is a subtype of "Printable | Drawable" (union) are those that implement either interface. For "Printable & Drawable" (intersection), you have objects that implement both interfaces. Meaning, those objects that have both .print() and .draw() (or similar). You're not taking the intersection of the interfaces, but of the sets of objects that implement them.