It's a saying that you do not have to be a genius to understand it. For example the em edtior (editor for mere mortals) where you could see what you wrote on th

It's a saying that you do not have to be a genius to understand it. For example the em edtior (editor for mere mortals) where you could see what you wrote on the screen instead of having to keep it all in your head... https://en.wikipedia.org/wiki/Vi https://en.wikipedia.org/wiki/Vi