Assume the statements are true.

Statements: Some sofas are not beds. All beds are cots.

Conclusions:

I. All sofas being cots is a possibility.

II. All cots being sofas is a possibility.

Explanation

1. 01

   For I, draw every sofa inside the cot circle, with some sofas in the part that is not beds. Every statement holds, so I follows.

2. 02

   For II, draw the cot circle (with the bed circle inside it) inside a bigger sofa circle, leaving some sofas outside the beds. Every statement holds, so II follows.

3. 03

   Both pictures are valid, so both possibilities follow.

4. 04

   Both I and II follow.