Other folks in other facilities act as if the person's not there. There are symptoms of dementia and for Alzheimer's the early symptoms of Alzheimer's disease are memory loss, short and long term memory problems, there's problems remembering, reasoning and thinking but memory deficits are most common in the beginning. Then what happens is the problems become so severe they interfere with daily living and a person requires supervision. The loss of language is common in Alzheimer's. It becomes more difficult to find appropriate words while having conversations.
People have problems finding the right phrases to complete sentences.
They may even substitute the word because they can't think of the word, like calling a dog a cat. They look at a cat and call it a dog. Or they may call a cat a hat because it sounds the same. Those are some of the things people start to have problems with. People with Alzheimer's disease have problems looking at something and trying to copy it, like a figure.