Proof that the external world exists?

Eric Schwitzgebel is reading Stannis Lem's novel 'Solaris' and discovers in the novel a test of the existence of the external world: I instructed the satellite to give me the figure of the galactic meridiansĀ it was traversing at 22-second intervals while orbiting Solaris, and I specified an answer to five decimal points. Then I sat … Continue reading Proof that the external world exists?