 Positivists and behaviorists had embraced operationalism for precisely the opposite reason: they thought operations were public, objective and verifiable, unlike private experience. But Bridgman was insistent that operations were a matter for private experience. He could see no warrant in simply taking someone else’s testimony as true or reliable, or in regarding the report of an operation performed by someone else as the same kind of thing as an operation performed and experienced by himself. In a later paper called “New Vistas for Intelligence” he declared: “Science is not truly objective unless it recognizes its own subjective or individual aspects” (Bridgman 1955, 556). As Holton puts it (2005, 74), Bridgman’s drive in operational analysis was “to throw the spotlight on performable action, above all an action performed by himself. Ultimately, he was a private man, so much so that he was accused of solipsism, to which he scarcely objected.” In his epistemic individualism Bridgman was perhaps only matched by Herbert Dingle, the founder of the British Society for the Philosophy of Science, among notable 20th-century philosophers of science (see Dingle 1950).