Unknowability

Rescher demonstrates, from within the interstices of traditional Logic, the essential class of unknowable truths to be a necessary feature borne out of finite cognitive abilities. His classification of unknowabilities according to their origin in evolutionary impredictability, verificational surdity, ontological excess, and vagrant predicates is built into a robust formal logical, and multi-value semantic-pragmatic, account of the individuated unspecifiability, unexemplifiability, and noncountability that determine the outermost reaches of reason.