There are two answers to the question of why we don’t yet fully understand Alzheimer’s. The simple answer is that the brain is remarkably complex, it’s the primary organ for cognition thus making investigation into the organ risky, and also research into the brain and mind are, relatively speaking, nascent fields. The more nuanced answer provides context into those stipulations. Alzheimer’s — a neurodegenerative form of dementia — is a condition with a constellation of symptoms that result from damage to the brain so there is nothing to be said about Alzheimer’s without first discussing what some call “the most complicated object in the universe,” the brain.