The great bulk of what we are pleased to deem knowledge comes to us via the words of others. But such knowledge is limited to (mere) information or plain fact. Theoretical, Ethical and Aesthetic discourse are three regions in which, even when we accept the words of others, we transmit content with what I dub prefaces, not flatly, not in our own voice. Explanation of this is suggested: in these regions assertions claim truth without claiming knowledge. So fact-theory and fact-value differ from plain fact for similar reasons, reasons which alleviate the urge to downgrade ethical discourse to the expressive or prescriptive.