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Blair and her sister Lisa are frequent flyers. \xa0Blair never checks her bags due to the inconvenience of it, opting instead to carry them on.\xa0 Since she\u2019s only 5\u20191\u201d, she often relies on the generosity of fellow passengers to help maneuver her bags into the overhead compartment.\xa0 Her sister Lisa feels that Blair and people like her abuse the convenience of a carry-on -- in short, if you\u2019re unable to completely manage your belongings on the plane, you should have to check them.\xa0 Who is right?