I was studying CRC from lecture notes of Schwarzkopf but I am stuck at this statement:
If $G(x)$ is a factor of $E(x)$, then $G(1)$ would also have to be $1$.
What does this statement means? It is the third point in the third last block of the article whose link is given. I know a similar question is asked but that is a specific question. I want to understand this particular statement.