You need to know how dw, de, cw, ce relate to each other, when the cursor is on a token character vs. a whitespace character, and so on, in order for this to be truly useful -- but luckily, ordinary practice with those commands in Vim can lead to an efficient internal idea of how it works. "You get used to it, though. Your brain does the translating. I don't even see the code. All I see is blonde, brunette, redhead."