The old joke circulating among Lacanians to exemplify the key role of the Other’s knowledge: a man who believes himself to be a grain of seed is taken to the mental institution where the doctors do their best to finally convince him that he is not a grain but a man; however, when he is cured (convinced that he is not a grain of seed but a man) and allowed to leave the hospital, he immediately comes back very trembling of scare [sic] - there is a chicken outside the door and that he is afraid that it would eat him. “Dear fellow,” says his doctor, “you know very well that you are not a grain of seed but a man”. “Of course I know that,” replies the patient, “but does the chicken know it?”

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