Given the task definition and input, reply with output. 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.

Mary went skiing this winter with some old skis. She was convinced that the skis were fine and not broken. Everything was going well until she hit some ice. The skis broke instantly. Mary ended up breaking her arm.
Why did Mary go skiing this winter with some old skis?
she thought the skis were fine.