Comment by rybosworld

It's true that the creative vs. logical side of the brain is mostly a myth.

But the hemispheres absolutely DO specialize in very predictable ways. Core language faculties are almost always handled by the left hemisphere, for instance.

Face processing is almost universally handled by the right hemisphere.

We know these things from people who have suffered an injury to one of their hemispheres. A person with damage to the right hemisphere has a chance of not being able to recognize faces, but that's almost never seen in an injury that exclusively effects the left-hemisphere.