What is dementia? We think we know (but we don't).

Teepa Snow says dementia isn’t a diagnosis, it’s more of a syndrome—a collection of symptoms.

In one of her excellent videos, Snow presents four facts: If you have dementia, at least two parts of your brain are dying. Second, you can’t bring back what’s lost, stop it or cure it.

“When someone is living with a brain change like dementia, it means the brain is gone,” she says.