In this episode of "Stuff You Should Know," Josh and Chuck delve into the complexities of dementia, clarifying that it is a set of symptoms caused by underlying diseases rather than a disease itself. They discuss various forms of dementia, including Alzheimer's, vascular dementia, and Lewy body dementia, detailing their causes, symptoms, and risk factors. The hosts also explore the challenges of diagnosis, the importance of early detection, and the impact on caregivers, recommending self-care and respite. They touch on treatment options, preventative measures like mental exercises and moderate alcohol consumption, and innovative approaches like dementia villages, while also addressing the ethical considerations of such methods.