 The Circle’s projects shared the aforementioned focus on language and experience. The ‘linguistic turn’, as it is known, was adopted as a philosophical tool in order to explicate the rationality and the objectivity—that is, inter-subjectivity—and communicability of thought. Lacking the transcendental dimension of Kant’s metaphysical apparatus, attention to language extended to non-scientific cases such as ‘ordinary language philosophy’ in Oxford. In the context of logical empiricism, the formal dimension of knowledge was thought to be manifest particularly in the exactness of scientific statements. For Schlick, knowledge proper, whether of experience or transcendent reality, was such only by virtue of form or structure—‘only structure is knowable’. For Carnap, in addition, the formal dimension possessed distinct methodological values: it served the purpose of logical analysis and rational reconstruction of knowledge and helped expose and circumvent ‘pseudo-philosophical’ problems around metaphysical questions about reality (his objections to Heidegger appealed to failures of proper logical formulation and not just empirical verification). In 1934 he proposed as the task of philosophy the metalinguistic analysis of logical and linguistic features of scientific method and knowledge (the ‘thesis of metalogic’). For Neurath, this approach helped purge philosophy of deleterious metaphysical nonsense and dogmatism, and acknowledged the radically social nature of language and science.