As its name suggests a position paper is an essay in which the author takes and supports a position on an issue. The same values and practices that apply to oral debate (e.g. logical reasoning appropriate evidence and collegial tone) also apply to position papers. The point is not to attack others; the point is to lay out thoughtful compelling reasons for a course of action.
Youmuststay with the same bioethical issue that your group orally debated but youdo notneed to argue on the same side that you were assigned for that debate. In fact it can be fun and enlightening to argue the opposite side.