"Not as far as modern-day linguists can tell," the Librarian says. "As I mentioned, it is largely impossible for us to grasp. Lagos suspected that words worked differently in those days. If one's native tongue influences the physical structure of the developing brain, then it is fair to say that the Sumerians—who spoke a language radically different from anything in existence today—had fundamentally different brains from yours. Lagos believed that for this reason, Sumerian was a language ideally suited to the creation and propagation of viruses. That a virus, once released into Sumer, would spread rapidly and virulently, until it had infected everyone."