Library Hours Notice with a Contradiction
The following notice is pinned outside the district library. Exam Support Week, 10–14 March. The library will open at 8:00 a.m. and close at 9:00 p.m. from Monday to Thursday. On Friday, it will close at 5:00 p.m. so that staff can reorganise the reference section. The silent study room is available only before 6:00 p.m. on all days. Students who need a computer after 6:00 p.m. should use the main reading hall, where eight terminals are reserved for exam candidates. Entry after 8:30 p.m. is through the east door only. A student, Meera, has a chemistry practical until 5:30 p.m. each day and needs a silent room and a computer for two hours on Friday. She also has a bus at 8:15 p.m. and must leave the library 15 minutes before it departs. She plans to arrive at 5:45 p.m. on Friday.
1. Is Meera's Friday plan possible? Work through the times and identify the first constraint that fails.
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No. She arrives at 5:45 p.m., but the notice says the library closes at 5:00 p.m. on Friday. A two-hour session would run until 7:45 p.m., which is also after the 5:00 p.m. closing and after the silent room's 6:00 p.m. limit. Her 8:15 p.m. bus is irrelevant because she cannot enter the library at 5:45. The earliest she could start a two-hour session on Friday would be 8:00 a.m., finishing by 10:00 a.m.; alternatively she could use Monday–Thursday before 6:00 p.m. The key reasoning is to apply the most specific Friday rule first, not the general 'all days' phrase.
2. The notice says the silent study room is available 'before 6:00 p.m. on all days', but Friday closing is 5:00 p.m. Does the notice contradict itself? Which statement should a reader follow, and why?
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Yes, there is a tension. 'Before 6:00 p.m. on all days' suggests the silent room could be used between 5:00 and 6:00 p.m. on Friday, but the library itself closes at 5:00 p.m. A reader should follow the specific Friday closing time because it names the day and gives a reason (staff reorganisation); the 'all days' phrase is a general statement that did not account for the exception. In functional notices, the specific rule normally overrides the general one, and the safer reading is that no room is available after 5:00 p.m. on Friday. To avoid confusion, the notice should say 'Friday: library and silent study room close at 5:00 p.m.'
3. Rewrite the Friday sentence and the silent-room sentence so that the contradiction disappears in no more than 35 words.
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Sample: 'On Friday the library and silent study room close at 5:00 p.m. for staff reorganisation. From Monday to Thursday, the silent study room is available until 6:00 p.m.' This is 30 words. The rewrite removes 'all days', attaches the exception to Friday, and keeps the 6:00 p.m. limit only for the days when it can actually apply. It also preserves the reason for the early closure, which is useful information for readers.