Instructions: You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.
Input: The rule of thumb is likely derived from the fact that people used the thumb as a measuring device. The length from the tip to the first knuckle is roughly an inch and perhaps the length of the inch is derived from this fact.
Output:
Where did the phrase "rule of thumb" come from?