The majority of your argument should be concerned with supporting your claim/position and the reasons your give in support of your claim (see pages 135-149 in Norton Field Guide). Make sure your claim is arguable, relevant, and well focused. Both your claim and your reasons must be backed with reliable evidence: facts, statistics, testimony, expert opinion, etc. You also must include in your arguments sections addressing opposing views, followed by a refutation (counterarguments) where you explain why the opposing views are weak or irrational and why your position is stronger, more rational. The best way to refute your opponents’ positions’ is to examine and contest the facts and assumptions on which they are based. You also can make some concessions, if you are unable to refute certain opposing.