“To distinguish the meaningful graphs that represent real or possible situations in the external world, certain graphs are declared to be canonical.”

—  John F. Sowa

Source: Conceptual Structures, 1984, p. 91. cited in: C.J. van Rijsbergen, F. Crestani, M. Lalmas (1998) Information Retrieval: Uncertainty and Logics. p. 59

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artificial intelligence researcher 1940

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