I am willing to re-state "I have a different definition of 'implementation'"? It actually occurred to me that that is how "full" might be being used in this context (I spent some time recently learning about bitcoin and even ran a class on it a few days ago, and had run into the distinction), but if I were to say I had "an end-to-end website rendering engine written in Erlang" would you not also feel a little disappointed when you got to my page and found only that "most of the core pieces, such as CSS3 selectors, DOM event bubbling, and network connectivity are done and we've open sourced the HTML parser"?