Q. I have heard people use the term dementia, and then others will say Alzheimer’s disease. What is the difference and how can I tell if my dad is developing either one of them? (From a son in Southern Wisconsin.) 
This is a very common question and there is a lot of confusion about this, so I am glad you asked.
Dementia is used as more of a general term that describes some symptoms.
The symptoms included in dementia are forgetfulness, repeating words or statements, and loss of judgment, to name a few.