My course evaluation form is used for several courses. One of the items within a matrix must not be visible for four courses, so the display logic for that item says to show the item if the embedded data for Course Does Not Contain Course A OR Course B OR Course C OR Course D.

But it doesn’t work; that item is still visible for those courses. Using  Does not equal makes no difference.

The same thing happened when I try it with other question types, so this issue is not something specific to matrices. 

Having multiple “Contains” or “Equals” conditions work just fine. It is only the multiple “Does not contain” or “Does not equal” conditions that do not. 

Any help you can provide would be appreciated.