One Step Forward From Agassi’s Inquiries on Logic: A Fallibilist Logic for Critical Rationalism

Critical rationalists cannot reconcile their falibilism with the demand of logic for universality. Popper tried, but failed, to achieve universality in logic without proof. Attempts to find a limited approach to logic as ‘logics of’ have failed to find a coherent critical rationalist alternative. Critical rationalists take Tarski’s logic to be the best of logic today. But Tarski renders logic as close to justification, and thereby universality, as possible. A fallibilist version of Tarskian logic can yield a critical rationalist alternative: It provides rules for solving problems in linguistic contexts, but also discovers mistakes by discovering errors in logical inference.