7 is the one I have the biggest problem with. The opposite of happiness is sadness, not boredom. Anyone who says otherwise fails at opposites, and should probably retake the first grade.

No. I am quite capable of telling my first grade teacher the verbal password "sadness" as the opposite to "happiness" but I have no particularly good reason to declare the two fundamentally opposite psychological states, nor any particularly good reason to believe that the conventional wisdom taught by my first grade teacher constitutes sound neurobiological insight.