The decider

Informing the debate over the reality of ‘free will’ requires learning something about the lateral habenula

Informing the debate over the reality of ‘free will’ requires learning something about the lateral habenula Kurt Stier/Corbis

At the end of The Matrix trilogy, Neo and Agent Smith are engaged in one final, interminable scene of surreal combat, a surrogate competition for an eternal battle between humans and machines.