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Johann Bernard Stallo (born March 16, 1823, Sierhausen, Oldenburg—died Jan. 6, 1900, Florence) was a German-American scientist, philosopher, educator, and lawyer who influenced philosophic study by criticizing contemporary scientific findings interpreted from linguistic theories of nature. Although initially he advocated Hegelian ontology as evidenced in General Principles of the Philosophy of Nature (1848), he later stressed his “two-fold relativity” of physical and cognitive phenomena. He pointed out that, although contemporary scientists claimed to be anti-metaphysical,...