Alzheimer’s: To Tell or Not To Tell My Father?

Dear Judy,
My father, who was a prominant attorney in Georgia, has recently been diagnosed with moderate-stage Alzheimer’s Disease. I know because I’m his adult daughter. He is just 72. It’s heartbreaking.
My question: Do I tell him he has Alzheimer’s? Or do I keep quiet? My mother and sister say we owe him the truth. But [...]