Unfortunately someone with advanced dementia does not know if she has eaten or not. Most of the time there will be no eating, unless someone else puts food in your mouth.

That wasn't the case with my father, who had a pretty good appetite up until his last few weeks.

I'm sorry for your first-hand experience, but I also need to remind you that 1 first-hand experience does not translate well to the overall population of people experiencing dementia.

That’s literally what it says in the story though. That it would only happen if the person won’t eat by themselves.

Why would they need to know whether they have eaten, or even what eating is? They would feel the sensation of gnawing hunger in their stomach, the same way a baby or animal does.

You ever hung out with someone in deep dementia ?

But seriously, how do you know that?