Teacher:In this task you are given a story and a question regarding that story. You must judge whether the question is answerable based on the info given to you. Label the instances as "Answerable" or "Not Answerable" based on your judgment. the story and the question are separated by a new line character.
Teacher: Now, understand the problem? Solve this instance: David wiped the sweat from his brow. He wondered if he were using the right tool He pressed the screwdriving just a little harder into the limestone. He thrust the tool and the rock gave way. It crumbled and fell to the floor.
Why did He wonder if he were using the right tool?
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Answerable