Falsifiability is exclusively about objectivity and measurability. For instance I think it's fairly safe to say that every single human of working faculties would claim they are conscious. This doesn't mean humans are conscious, because it can't be falsified. Our philosophical zombie, for instance, would say exactly the same no doubt.
And no idea if the reference to Prozac was random, but yeah that is a good example. It's effect is not falsifiable at all. It's based on self reporting. And controlled studies, particularly those not carried out by parties with a vested interest in the outcome, shows its effect be scarcely better than placebo. Some might cling onto to that with 'well that does mean it's still better!' yet Prozac has extreme, and rather rapid onset, side effects which makes it basically impossible to not know if you're getting the right thing. This completely ruins double blinds, and could largely explain what little effect it does show.
And no idea if the reference to Prozac was random, but yeah that is a good example. It's effect is not falsifiable at all. It's based on self reporting. And controlled studies, particularly those not carried out by parties with a vested interest in the outcome, shows its effect be scarcely better than placebo. Some might cling onto to that with 'well that does mean it's still better!' yet Prozac has extreme, and rather rapid onset, side effects which makes it basically impossible to not know if you're getting the right thing. This completely ruins double blinds, and could largely explain what little effect it does show.