And it would be nice to see, okay, what was everyone's blood pressure before the experiment? And you can say, okay, well, the averages are similar going into the experiment. And then you go some amount of time, and you measure blood pressure. And if you see that, wow, this group definitely has a higher blood pressure. This group has a higher blood pressure. So the blood pressure, the blood pressure is higher here. And once again, some of this might have just happened randomly.