Well yes. It would be a mistake to determine just because we can't know everything that we are doomed to individually conceived perceptions of the world. We are still capable of sharing our knowledge and experience and compiling a more comprehensive understanding of the world. The lines of reasoning which stand up this collective critique and are verified by the accumulation of empirical evidence stand out and prove most useful. My point is mainly that, by the time you turn epistemology into a collaborative project, no single person is dictating it. No single person's word is the "gospel."