Some medieval philosophical rationalists, such as Maimonides (Mosheh ben Maimon, the "Rambam") held that it was not required to read Genesis literally. In this view, one was obligated to understand Torah in a way that was compatible with the findings of science. Indeed, Maimonides, one of the great rabbis of the Middle Ages, wrote that if science and Torah were misaligned, it was either because science was not understood or the Torah was misinterpreted. Maimonides argued that if science proved a point, then the finding should be accepted and scripture should be interpreted accordingly. Before him Saadia Gaon set rules in the same spirit when allegoric approach can be used, for example, if the plain sense contradicts logic. Solomon ibn Gabirol extensively used allegory in his book "Fountain of Life", cited by Abraham ibn Ezra. In 1305 Shlomo ben Aderet wrote a letter against unrestricted usage of allegory by followers of Maimonides, like Jacob Anatoli in his book "Malmad ha-Talmidim". In spite of this Gersonides copied Maimonides' explanation the story of Adam into his commentary on Genesis, thinly veiled by extensive usage of the word "hint". The main point of Maimonides and Gersonides is that Fall of Man is not a story about one man, but about the human nature. Adam is the pure intellect, Eve is a body, and the Serpent is a fantasy that tries to trap intellect through the body.