 Because you have the cognitive decline as far as the memory and function, but you also will sometimes have weird behaviors that come out of that decline as well. And so different treatments kind of target those two things mainly. And exercise can help both and mental stimulation. And I think that's what hearing is. When we're sitting here with full hearing, it's like when I tell people in my office, I can hear that clock ticking. I can hear the music playing in the hallway.