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How does Davidson’s principle of charity guide the interpretation of another speaker’s words?

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Marble bust of Aristotle with a beard and draped robe, showing detailed facial features and wavy hair, set against a dark background. — Truth Detail of a Roman copy (2nd century bce) of a Greek alabaster portrait bust of Aristotle (c. 325 bce); in the collection of the Museo Nazionale Romano, Rome.

In the context of philosophy and logic, Donald Davidson’s principle of charity is a fundamental constraint used during the process of "radical interpretation" to assign meaning to another speaker's utterances.1

The principle dictates that when interpreting a speaker, one must assume that the speaker is generally rational and that the majority of their beliefs and sentences are true. Interpretation proceeds by collecting the sentences a speaker "holds true" and constructing a semantic theory that specifies the circumstances under which those sentences would indeed be true.12

By attributing a largely consistent and truthful set of beliefs to the speaker, the interpreter creates a common conceptual scheme. Davidson argued that this is a necessary condition for communication: one cannot assign meaning to the words of others unless one assumes they share a basic understanding of the world. Consequently, the principle of charity serves as a safeguard against conceptual relativism, as it implies that a shared conceptual framework is a prerequisite for viewing others as thinking beings at all.2