This Pencil Doesn't Exist

Riddle: Mr. Martinez is a philosophy teacher at a prestigious university. One day, he places a pencil onto his desk and gives his students an assignment: to write a short essay on the following topic- why the pencil does not exist. The student with the most convincing argument would get an A, while everyone else would get a D. An hour later, all of the students handed in their papers; most of them filled up the front and back of their papers, but one boy wrote just two words and he got the A. What words did he write?

Answer: The boy wrote, "What pencil?".

Source: https://www.riddles.com/index.php/11383

Mr. Martinez is a philosophy teacher at a prestigious university. One day, he places a pencil onto his desk and gives his students an assignment: to write a short essay on the following topic- why the pencil does not exist. The student with the most convincing argument would get an A, while everyone else would get a D. An hour later, all of the students handed in their papers; most of them filled up the front and back of their papers, but one boy wrote just two words and he got the A. What words did he write? — This Pencil Doesn't Exist by Gabriella Simonetti Riddle