Normal cognitive decline comes gradually with age to most people. Dementia is more severe, often more sudden, and can be caused by a host of things, from Alzheimer's to brain injury. Regardless, you're not going to take away somebody's computer because their brain isn't quite as sharp as it once was.
Right but an age-related illness that affects cognition is generally just called dementia.
Normal cognitive decline comes gradually with age to most people. Dementia is more severe, often more sudden, and can be caused by a host of things, from Alzheimer's to brain injury. Regardless, you're not going to take away somebody's computer because their brain isn't quite as sharp as it once was.