The Dali paradox, also known as the "melting clock effect", refers to a temporal fissure which slows the passage of time to a gradual halt. In the 29th century, Lieutenant Ducane quizzed Seven of Nine on this paradox, after having recruited her from the year 2375 for an important mission. (VOY: "Relativity") This paradox was apparently named after Salvador Dalí's famous painting The Persistence of Memory.