I don't think that there's such a thing as a "finite state of knowledge acquired" regarding Linux, since it's a moving target.
Not true! I know everything that there is to know about Linux (this also includes things that haven't yet been developed).
I was able to aquire this awe inspiring infinite wisdom by simply having no other choice. My windows finally gave out on me and I didn't have my own copy (nor did I feel like buying one). It was either learn Linux or don't use my computer. In reality, I probably know far less then 1% about Linux. But if you first learn where to look for answers, then you can say that you know everything you need to know.