Hatata (Ge'ez: ሓተታ ḥatäta "inquiry") is a 1667 ethical philosophical treatise by Ethiopian philosopher Zera Yacob, written at the request of his patron's son Walda Heywat. The philosophy is theistic in nature and came during a period when African philosophical literature was significantly oral in character. It has often been compared by scholars to Descartes' Discours de la methode (1637). Upon Yacob's death in 1692 his pupil Walda Heywat updated the work to include his death.