Plato controlled his disciples on a bridge and did not allow anybody to cross without his permission. One day, Socrates arrived at the bridge, and demanded that Plato let him pass. Plato did not like the tone of his teacher’s voice and said to him: “If the first statement you say is the truth, I shall let you pass; but if the first thing you say is a lie, I swear that I will throw you into the turbulent water.” Socrates thought for a bit and said: “You will throw me into the water.” …an almost identical paradox appears in chapter 51 of the second volume of Don Quixote, when Sancho Panza is appointed as governor of the Island of Barataria.

— Haim Shapira, Eight Lessons on Infinity