That's quite a statement. I mean, sure, the entirety of why selectively inhibiting serotonin reuptake might affect psychological outcomes may be a bit fuzzy at

That's quite a statement. I mean, sure, the entirety of why selectively inhibiting serotonin reuptake might affect psychological outcomes may be a bit fuzzy at the end, but there is a pretty solid theory here isn't there? The drugs work by selectively inhibiting serotonin reuptake. This leads to more serotonin signaling. Sure it gets a little fuzzy from there to how this mechanism affects mood disorders with various competing theories, but "unknown" is quite a stretch here.