Rudolf Carnap (1891–1970) filósofo alemán
Original: «Science is a system of statements based on direct experience, and controlled by experimental verification. Verification in science is not, however, of single statements but of the entire system or a sub-system of such statements».
Fuente: The Unity of Science. Routledge Revivals. Rudolf Carnap. Editorial Routledge, 2013. ISBN 9781136654282.