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It's impossible to say definitively. As his condition degrades, it's possible he could become less mean, but don't expect him to be able to go back to the way he was before he started showing dementia symptoms. Future advances in medicine may be able to stop the progression of the disease, or maybe even help prevent it, but at the moment the only thing medicine can do is slow down its progression.

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9y ago

What else can I help you with?