A bridge has a weight limit of 10 tons. A truck weighs 12 tons. Therefore the truck cannot cross the bridge safely.
Which one of the following is an assumption on which the argument depends?
Answer and explanation
Correct answer: C. The weight limit accurately reflects the load that the bridge can safely carry
- Step 1: The argument treats the posted limit as the real safety limit. Step 2. If the limit were far too low, the conclusion would fail. Answer: the limit reflects safe capacity. Why not the others: these do not support the inference.
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