The emergence of comprehension to back to the Koran and Sunnah in Indonesia is not only driven by the reality of Islamic beliefs which is mixing with other elements, but also caused by the system of understanding of Islamic taeching which are considered less precise. Call it like understanding the meaning of sunnah, heresy, ijtihad, ittiba', taqlid, and others. Ahmad Hassan, a MUslim thinker wh…