Careful, ynk. We don't want to say something "can't be assumed" or we risk confusing this with an inference question. It's true that if we know that models and movie stars boost sales, we can't infer that they necessarily triple sales. However, we're not looking for an inference. We're looking for something needed that's missing from the argument.
So . . . looking back at the argument, are we ever told that models and movie stars boost sales? Actually, no. Some people think the new covers
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So . . . looking back at the argument, are we ever told that models and movie stars boost sales? Actually, no. Some people think the new covers
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