Further issues: there are descriptions in the introduction that are either historically questionable or simply wrong, but I don't know how to change them. Steve, do you know how to do this? According to the terminology of Ibn al-Haytham's own time, he can be described as a philosopher or a geometer. But his philosophical activities are certainly of a lesser degree than his geometrical ones, unless we reduce philosophy to natural philosophy. Optics fall under geometry. Terms like scientist or mathematician did not exist and he would not have recognized himself in them. I would like to delete them. He could be called astrologer (munajjim), but I never saw him called that in those primary sources that I know. Hence I would not like to use it for the time being. I will check the sources to make certain. As for polymath, this is the only description not found in Ibn al-Haytham's own time and scholarly tradition that I would use since it gives the reader a certain feeling for the broad range of themes about which he wrote. Most of the sources for the introduction are texts by people without the necessary professional competence for Ibn al-Haytham or the history of science in Islamicate societies. It is thus urgently necessary to edit this introduction to free it from incompetent evaluations. ..