| Critical Reasoning Butler: February 2025 |
| February 18 | CR 1 | CR 2 |
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CR 1 Those who practice cross-training while recovering from feet injury spend more time on their feet than those who do not. Even accounting for disparities in the severity of the injuries, those who practice cross-training heal faster than do those who do not. This is puzzling because an injured body part that is put into regular use typically heals slower than one that is allowed to rest.
Which of the following, if true, best resolves the apparent discrepancy described in the passage?
A. Spending time on their feet increases the patients’ blood flow to feet, causing the injured feet muscles to absorb more of the nutrients needed to heal.
B. Cross-training increases the patients’ confidence, encouraging them to start walking.
C. Increased activity leads to an increased demand for nutrients needed to heal injuries.
D. Cross-training does not increase the recovery rate of middle-aged individuals, if they had not undergone cross-training before.
E. Those recovering from feet injury need more rest than those recovering from other injuries do.
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CR 2 An anthropological survey in the Vashland peninsula unearthed fragments of fossilized wood and pieces of sharpened flint dating back two million years. Analysis of the findings showed that the flint had been sharpened by striking it with quartzite, the most common type of stone in the Vashland peninsula.
Which of the following, if true, would, taken into consideration with the above information, provide the best basis for the claim that the flint and wood fragments are proof that early hominids used relatively complex stone and wood tools?
A. The quartzite is used as a building material by the present-day inhabitants of Vashland peninsula.
B. Landslides can cause flint to be struck by quartzite.
C. The flint and wood fragments were found in several discrete layers of metamorphic stone that contained fossilized traces of plant resin known to have been used as an adhesive agent by early hominids.
D. Apart from the Vashland discovery, there is reliable evidence that early hominids used relatively complex stone and wood tools as early as one million years ago.
E. The flint fragments were analyzed by anthropologists to determine the exact area of the Vashland peninsula they had been mined from.