““In ancient Indo-European (...), the word *er* means "to move," "to set in motion," or simply "to go." (...) That root gave rise to the Latin verb *errare*, meaning to wander or, more rakishly, to roam. The Latin, in turn, gave us the English word "erratic", used to describe movement that is unpredictable or aimless. And, of course, it gave us "error." From the beginning, then, the idea of error has contained a sense of motion: of wandering, seeking, going astray.””