I don't know that you should aim for a specific word target (quality>quantity), but generally I think you should aim for one paragraph that explains your position, a second paragraph that explains why the other position isn't as good as yours, and a third "conclusion" that's brief. Or you could also do one paragraph explaining the pros of both arguments, a second explaining cons of both choices, and a third defending your choice, or another variation but I think three paragraphs is reasonable. The PowerScore blog and podcast explains this in more detail if you're struggling.
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I don't know that you should aim for a specific word target (quality>quantity), but generally I think you should aim for one paragraph that explains your position, a second paragraph that explains why the other position isn't as good as yours, and a third "conclusion" that's brief. Or you could also do one paragraph explaining the pros of both arguments, a second explaining cons of both choices, and a third defending your choice, or another variation but I think three paragraphs is reasonable. The PowerScore blog and podcast explains this in more detail if you're struggling.