The indeterminacy of translation is a thesis propounded by 20th-century American analytic philosopher W. V. Quine. The classic statement of this thesis can be found in his 1960 book Word and Object, which gathered together and refined much of Quine's previous work on subjects other than formal logic and set theory. The indeterminacy of translation is also discussed at length in his Ontological Relativity. Crispin Wright suggests that this "has been among the most widely discussed and controversial theses in modern analytical philosophy". This view is endorsed by Putnam who states that it is "the most fascinating and the most discussed philosophical argument since Kant's Transcendental Deduction of the Categories". Three aspects of indeterminacy arise, of which two relate to indeterminacy of translation. The three indeterminacies are (i) inscrutability of reference, and (ii) holophrastic indeterminacy, and (iii) the underdetermination of scientific theory. The last of these, not discussed here, refers to Quine's assessment that evidence alone does not dictate the choice of a scientific theory, as different theories – observationally equivalent – may be able to explain the same facts. The first refers to indeterminacy in interpreting individual words or sub-sentences. The second refers to indeterminacy in entire sentences or more extensive portions of discourse. Inscrutability of reference Indeterminacy of reference refers to the interpretation of words or phrases in isolation, and Quine's thesis is that no unique interpretation is possible, because a 'radical interpreter' has no way of telling which of many possible meanings the speaker has in mind. Quine uses the example of the word "gavagai" uttered by a native speaker of the unknown language Arunta upon seeing a rabbit. A speaker of English could do what seems natural and translate this as "Lo, a rabbit." But other translations would be compatible with all the evidence he has: "Lo, food"; "Let's go hunting"; "There will be a storm tonight" (these natives may be superstitious); "Lo, a momentary rabbit-stage"; "Lo, an undetached rabbit-part.