Assume the statements are true.

Statements: Some mirrors are frames. Some frames are windows.

Conclusions:

I. Some mirrors are windows.

II. No mirror is a window.

Explanation

1. 01

   Two 'Some' statements give no definite link between mirrors and windows: the mirror-frames and the frame-windows may or may not share members.

2. 02

   So I is not definite, and II is not definite either.

3. 03

   I and II are about the same pair and are exact opposites (Some … are / No … is); in every possible picture exactly one of them is true.

4. 04

   Either I or II follows.