So let's say we want to do that. So we could do double, double blind experiment. So even the person giving the pill doesn't know which pill they're giving. And you might say, well, why is that important? Well, if the physician knows it might, or the person administering or interfacing with the patient, they might give a tell somehow. They might not put as much emphasis on the importance of taking the pill if it's a placebo. They might by accident give away some type of information.