You must be flexible. Sometimes, some teachers make mistakes in their lectures, so you have to use your own brains. If you think it's wrong, he's wrong. There's no need to doubt it. Indeed, I have found many videos with errors in the past, not to say that experts can't, but to make mistakes unintentionally. Just find them in time.
Geographical coordinates are: up north and down south, left west and right east.
The coordinates of Yi-ology are: far apart, Zuo Dong is due west.
It's actually the same direction. It's just a different story