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Just to be sure it's clear, although we can get away with posting pictures of girls who are just sad, there is a huge difference between sadness and depression, especially when it comes to clinical depression and not just a temporary depressed state.
Depression is not just an elevated state of sadness. You can even have a functional form of depression where it's not even obvious to those in your day-to-day life. We could post girls who look ecstatic, but they're still suffering from deep depression.