Or perhaps you're just misunderstanding my complaint. The comment taken as a whole ("in context", if you prefer) proposes that social networks provide a brief

Or perhaps you're just misunderstanding my complaint. The comment taken as a whole ("in context", if you prefer) proposes that social networks provide a brief jolt of happiness in the short-term, but its net result is making unhappy people feel more unhappy in the long-term. Under those assumptions[1], only the most committed pedant would claim that it's incorrect to say that "social networks don't cause unhappiness" is true. [1] This is the reason I clarified that I was limiting myself to your comment, because the question of whether your assumptions are true is another one entirely.