Feynman even helped him with his algebra homework, he recalled.

One key operation in a deep neural network involves the use of linear algebra to perform matrix multiplication, which transforms data as it is passed from layer to layer.

“There was nothing magical about the remaining ballots,” McCoy says, calling the calculation “a simple algebra problem.”

"Instead of sitting there looking at the board trying to solve the algebra problem, you're sitting thinking, when I get home, what am I going to eat?"

Witnesses said the suspect left an algebra lesson on Wednesday morning only to return later and try to re-enter the classroom.