We were taking a test on letter sounds in kindergarten. At one point, I was experiencing the tip-of-the-tongue phenomenon where I felt that I knew the answer, but it just wasn't coming to me. So, since I 'knew' the answer, I figured I'd look at a classmate's paper.

The answer was the letter D.

My teacher caught me and told me to give myself a 0 for cheating. But I didn't, because I already 'knew' the answer.