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Normally, in a position paper, you would take a position regarding the issue, and give your opinion about it, supporting your position with persuasive argument and facts gleaned from various sources. In doing this, you might want to present arguments others have made which contradict your position, and explain why your view is the correct one. Unless your instructor specifically told you to make it two-sided, I'd suggest doing it that way: take a position, support it, and counter the arguments against it.
I hope this is helpful to you!
Thanks,
Sarah, EssayForum.com
Sarah, EssayForum.com