 This guy is not a hard case. But I've had relatives who have gone through issues, neurological issues, and I've heard that sometimes Parkinson's is not very easy to nail. You have to take a lot of tests. Early on, if you're just presented with hallucinations, that could be a variety of things, or just the cognitive problems, that could be Alzheimer's versus Parkinsonism, and that becomes a little nebulous.