Absolutely, and you know what? Jocelyn talked about that. It's going to be really important to have exactly what that person's wishes are at that time.
It's also important to have that person meet with an informed person, a physician or a nurse, who knows what dementia looks like, and to have it documented that the person actually did have a full understanding of what they were talking about at the time. It may be that they may not fully understand what happens in 20 years, but at least we have some idea that they had a discussion with someone to think through all the issues. I think people very frequently sign things they don't understand. It's very common.