Difficulty: Medium
Correct Answer: SPQR
Explanation:
Given data
Concept/Approach
State primary function → acknowledge limitation → general conclusion → mechanical detail.
Step-by-step reasoning
S: Start with the precise role of a weather-vane. P: Underscore that it is only a wind-direction indicator. Q: Therefore, by itself it cannot forecast weather. R: Provide the specific operational description (points to wind's source).
Final Answer
SPQR
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