Yes, it hinges on the definition of "to know everything about something" as if there are neatly defined epistemic boundaries. Not all knowledge can be captured

Yes, it hinges on the definition of "to know everything about something" as if there are neatly defined epistemic boundaries. Not all knowledge can be captured in words. Also, this assumes that all knowledge can exist independent of perspectives. No. There are qualia that are necessarily unique (because our constellation of experiences that generate these is unique) that we do not have shared definitions -- which is what words are. To then say that one can "know everything" is meaningless. It's generally the case with these seeming conundrums. The fault lies in the most basic of assumptions that are almost invisible to us because they rely on our intuition.