The Altercatio Hadriani Augusti et Epicteti philosophi is a Latin language question-and-answer dialogue composed by an anonymous author in the 2nd or 3rd century.

In its earliest form it consists of seventy-three questions on matters of wisdom and natural phenomena posed by Hadrian and answered by Epictetus.

[2] Among the works of the Jewish writer Philo of Alexandria are Questions and Answers for problems relating to the books Genesis and Exodus.

[4] The historian Anthony Birley remarks: "it is difficult to avoid the conclusion that the friendship with Epictetus was formed when Hadrian was on his way to Athens for the first time, in about the year 110 or 111.

[6] Subsequently a second version appeared with the title Disputatio Adriani Augusti et Epicteti, but this text consists of only twenty-one questions and answers, almost all of them taken from the Altercatio.

[6] In this work the conversation takes place between emperor Hadrian and a three-year-old wise child called Epitus,[11] or Apitus.

[10] The content of the work has little to do with natural philosophy, instead the questions and answers are mostly religious ones concerning Christian doctrine, morals, and biblical topics.

[11] The Enfant Sage was a very popular work, appearing in various forms in forty or fifty manuscript versions during the late Middle Ages, and in many languages ranging from Catalan to Welsh.

[1][10] In the fourteenth century an anonymous poet rewrote the Enfant Sage into a Middle English poem called Ypotis.

[10][12] The poem survives in fifteen manuscripts from the 14th and 15th centuries, and Geoffrey Chaucer refers to Ypotis as a well-known "romance" in his Sir Thopas Canterbury Tale.