As our information-processing technologies improve and become better and better adapted to fit the niche provided by the biological brain, they become more like cognitive prosthetics: non-biological circuits that come to function as parts of the material underpinnings of minds like ours.

Andy Clark, professor of logic and metaphysics in the School of Philosophy, Psychology, and Language Sciences at Edinburgh University, remarking on the progressive integration of so many digital tools into our lives: via NYT