Staying for an answer

Abstract

Should the truth-value of statements be thought of as epistemically constrained or as determined by objective factors that stand quite apart from our best knowledge, evidence, or powers of conceptual grasp? The anti-realist/realist debate turns ultimately on this disagreement. My article takes its lead from a famous pronouncement by US Defense Secretary Donald Rumsfield to the effect that there are ‘known knowns’, i.e. ‘things that we know we know’; ‘known unknowns’, or ‘things we know we do not know’; and lastly, ‘unknown unknowns’, ‘things we don’t know we don’t know’. Whether Rumsfeld was talking gobbledegook, making some acute logical points, or just pulling the wool with regard to Iraq’s disputed weapons capability is matter for debate. Still, his remarks may be useful for clarifying certain fundamental issues about knowledge and truth, especially in the context of assertions - by anti-realist philosophers such as Michael Dummett - that truth cannot possibly transcend our best powers of proof or ascertainment. On the other hand such scruples may have just the opposite (obfuscating) effect when we are faced with a complex and case-specific question, such as whether or not Iraq truly possessed weapons of mass destruction. My article contends that a wide range of reliably knowledge-conducive procedures, while indeed they fall short of absolute, indubitable truth, nonetheless offer grounds for arriving at a reasoned assessment of the evidence and for not consigning statements of the Dummettian ‘disputed class’ to a limbo of ultimate undecidability.