Only 75 years ago, the best fishihg in the world was the Grand Banks of the North Atlantic. But now overfishing and man’s pollution have decimated the area. There will be no fishing industry in the Americas in a few years. The waters off Newfoundland now yield less than the catch of five years ago, and less than one quarter of the total of ten years ago. The cod has almost disappeared. The numbers of fishermen in Newfoundland and New England have declined, and their yearly earnings are now at an all-time low. Yet radar has made fishing methods more efficient than ever. I Which one of the following identifies most clearly a faulty assumption in the reasoning of this passage?