When I was a senior in high school, I had to take a literature exam. On the exam, the essay question was "What is courage?" Most of us settled in to write these lengthy dissertations in order to impress the teacher with our compositional prowess. But the guy diagonally in front of me flipped to the essay page, wrote something very quickly, stood up, set the paper on the teacher's podium, and walked out of the classroom.

I found out later what he had written from some of my classmates.

Simple. Two words. 'This is.'.

Needless to say, the kid got an 'A'.