This paper will seek to logically critic and evaluate the Documentary Hypothesis, expose its errors, and defend the traditional position of Mosaic authorship of the Pentateuch. To do this, first a brief overview of the history of the Documentary hypothesis will be presented. This will include some of its main developers and supporters. How was it developed, and what were the influences and contexts from which it emerged? Next, the main arguments and claims of the documentary hypothesis will be outlined and explained. Finally, those arguments will be refuted, and an apologetic defense of Mosaic authorship will be presented.