Inquiry

Lore & Background

The study of inquiry has roots in classical logic, particularly in the works of Aristotle, who identified three fundamental modes of reasoning: deduction, induction, and abduction. In the Prior Analytics, Aristotle described deduction as a syllogism where if A is predicated of all B, and B of all C, then A must be predicated of all C. Induction, he wrote, consists in establishing a relation between one extreme term and the middle term by means of the other extreme. Abduction, or reduction, occurs when the first term applies to the middle but the middle applies to the last term is not obvious, yet is more probable or not less probable than the conclusion. In the pragmatic philosophies of Charles Sanders Peirce, William James, John Dewey, and others, inquiry is closely associated with the normative science of logic. Peirce extracted the pragmatic model of inquiry from classical logic, with help from Kant, and refined it in parallel with the early development of symbolic logic by Boole, De Morgan, and Peirce himself. Dewey defined inquiry as 'the controlled or directed transformation of an indeterminate situation into one that is so determinate in its constituent distinctions and relations as to convert the elements of the original situation into a unified whole.'

These three processes typically operate in a cyclic fashion, systematically reducing uncertainties and difficulties that initiated the inquiry. The purpose of inquiry is to reduce doubt and lead to a state of belief, which a person in that state will usually call knowledge or certainty. Peirce argued that inquiry reaches a logical limit, or 'approximate[s] indefinitely toward that limit,' which he regarded as 'truth.'

Reader's Guide

Inquiry is significant as a foundational concept in logic and epistemology, bridging classical and pragmatic traditions. The source article distinguishes three modes of reasoning: deduction, which can be made exact and always derives true conclusions from true premises; abduction, used to generate likely hypotheses; and induction, used to test predictions against data. These three modes operate in a cycle, each contributing to the end of inquiry. Deduction is demonstrative, while abduction and induction are non-demonstrative and subject to error, requiring constant checking and correction. The pragmatic paradigm emphasizes that the purpose of inquiry is to reduce doubt and lead to belief, and that the three kinds of inference can only be understood as a whole. This framework has influenced scientific reasoning and the social nature of inquiry, as summarized in the notion of a community of inquiry. The limits of inquiry, according to Peirce, involve an indefinite approximation toward truth.

Did You Know?

• Aristotle described three modes of reasoning in his Prior Analytics: deduction, induction, and abduction.
• In the pragmatic paradigm, inquiry is closely associated with the normative science of logic.
• Deduction is the only one of the three types of reasoning that can be made exact, always deriving true conclusions from true premises.
• Peirce argued that inquiry reaches a logical limit, or 'approximate[s] indefinitely toward that limit,' which he regarded as 'truth.'