A bad way to make 3rd-grade to 8th-grade kids suffer is by forcing them to do a test. Occasionally, they will have breaks, so they don't get mad and calm down.
Peter: Does everyone have to do a TDA?
Fred: Yes.
Peter: WHY
Fred: But you will get breaks.
You or other people are depressed and happy at the same time. Or a person who loves decaffeinated coffee and feels happy drinking it.
Peter: Hey Tim! Is your friend group dehappy?
Tim: Nope, we just ate food.
Peter: Oh, so I heard that your other friend said she is dehappy all the time!