It's important to have approximate knowledge of many things, including how to look up and figure out the shit you don't know. That said, I think you balance as

It's important to have approximate knowledge of many things, including how to look up and figure out the shit you don't know. That said, I think you balance assumptions vs knowledge in order to be effective. Like you assume that it's in the man pages, and the man pages describe the code that is being used on your system, but it's entirely possible that your version of vim or whatever is different then the one described in the system wide man page.