In this overview article, we first explain what we take informal logic to be, discussing misconceptions and distinguishing our conception of it from competing ones; second, we briefly catalogue recent informal logic research, under 14 headings; third, we suggest four broad areas of problems and questions for future research; fourth, we describe current scholarly resources for informal logic; fifth, we discuss three implications of informal logic for philosophy in particular, and take note ofpractical consequences of a more general sort.

The problem with the pragma-dialectical view, it has been argued, is that it takes argumentation as aiming at consensus rather than truth or justified belief. The pragma-dialecticians often imply that an argumentative process aiming at consensus in a way constrained by the “Ten Commandments” will in the long run converge on epistemically favourable standpoints. I will argue that they are right provided (i) pragma-dialectics is construed, as they say, as a theory of criticism; (ii) pragma-dialectics and the other theories of (...) argumentation have in common the requirement to account for the fallacies. (shrink)

I argue in a non-reductive sense for a plausible epistemic principle, which can (1) theoretically and instrumentally unify or systematize all fallacies, and (2) provide a justification for using such a principle for characterizing an erroneous argument as a fallacy. This plausible epistemic principle involves the idea of an error in the method of justification, which results in a failure to provide relevant evidence to satisfy certain standards of adequate proof. Thus, all fallacies are systematically disguised failures to provide substantive (...) proof: a failure in the attempt to persuade rationally, as opposed to emotionally or rhetorically. I argue that the epistemic idea of begging the question is essential to this idea of a fallacy as an inadequate proof. (shrink)