One friend of mine told me once that no matter how much you read about sex, you have to practice it in order to understand it. We, as men, will never actually understand female orgasms and women will never know how ours are felt, no matter how accurate one tries to describe it.
I don't know what the above means in the context of "the knowledge argument" but these are easier to understand examples than "not experimenting the red color" in the article