 Though Carnap had redesigned the system in 1924 to dispense with the phenomenological development of the “primary world” from which the “realities” or “secondary worlds” of science and everyday reality were constructed, it could be said that he adopted Husserl’s method of “bracketing” the supposed external reality to which our subjective world appears to refer—and that he adopted it more radically and strictly than Husserl himself. For Carnap bracketed not just the external reality but also the internal subjectivity, leaving only the bare logical structure of the constitution system unbracketed (Carus 2016). 