Are you happy?

The thing with happiness is that you can be happy but not show it. But when you are depressed, you can tell very easily that the person is sad. That's probably the biggest reason why it's very hard to diagnose someone as being happy. Some people are just perpetually happy, also making it harder to know if they are truly happy or if they are drugged or have a mental issue or something. And although there are studies on happiness, I still don't think we will find any sure fire way to diagnose someone with happiness, unless they tell you. But then again, people tend to lie a lot, making it harder to really know if they are happy.