In 2006 the AIS consisted of about 250 scientists, among them a little fewer than 50 full members, including co-founder Reinhard Selten.
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The AIS was founded on an initiative of scientists from various countries, such as Helmar Frank, Humphrey Tonkin, and Reinhard Selten.
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The position of the object of scientific research in Karl Popper's "three worlds": the outer world as perceived sensually, the mental world and the world of abstractions.
In 1983 he was among the founders of the Esperantophone Akademio Internacia de la Sciencoj San Marino (AIS).
Ralph Lewin was an Esperantist, and was Ordinary professor (Ordaj profesoroj) at Akademio Internacia de la Sciencoj San Marino, the only university in the world where all courses are studied in esperanto.
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