Detailed Instructions: In this task you are given a short story and a question regarding that story. You must answer the question based on the events of the story. Try to use the same words in the story to answer each question. You should completely answer the question in a short answer. Do not include information that is unnecessary to answer the question.
Q: Pat bought a ruler at an office supply store. He began to measure things for an experiment. Pat suspected that the ruler was not accurate. He took out a second ruler to compare the two. He found that his new ruler was slightly shorter than his old one.
Why did He find that his new ruler was slightly shorter than his old one?
A:
He took out a second ruler to compare the two.
He found that his new ruler was slightly shorter than his old one.