Source: 1960s - 1970s, The Design of Inquiring Systems (1971), p. 10; cited in Daniel J. Power (2004) Decision Support Systems: Frequently Asked Questions, p. 23
“We define a semantic network as "the collection of all the relationships that concepts have to other concepts, to percepts, to procedures, and to motor mechanisms" of the knowledge."”
Source: Conceptual Structures, 1984, p. 76 as cited in: Jacques Demongeot (1988) Artificial intelligence and cognitive sciences. p. 179
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John F. Sowa 9
artificial intelligence researcher 1940Related quotes
George W. Bush and Osama bin Laden Are Dancing Together (2003)
“Your concept is a tremendous network of inconsistencies.”
“In what way?” the countess said, not very much interested.
“It seems to be based on reverence for the young, and an extremely patient and protective attitude toward their physical and mental welfare. Yet you make them live in these huge caves, utterly out of contact with the natural world, and you teach them to be afraid of death—which of course makes them a little insane, because there is nothing anybody can do about death. It is like teaching them to be afraid of the second law of thermodynamics, just because living matter sets that law aside for a very brief period.
Source: A Case of Conscience (1958), Chapter 12 (pp. 149-150)

“The percept takes priority of the concept.”
Letter to Edward T. Hall, 1971, Letters of Marshall McLuhan, p. 397
1970s

“The new science of communication is percept, not concept.”
Source: 1990s and beyond, The Book of Probes : Marshall McLuhan (2011), p. 259

Physics and Philosophy (1958)
Context: The words "position" and "velocity" of an electron... seemed perfectly well defined... and in fact they were clearly defined concepts within the mathematical framework of Newtonian mechanics. But actually they were not well defined, as seen from the relations of uncertainty. One may say that regarding their position in Newtonian mechanics they were well defined, but in their relation to nature, they were not. This shows that we can never know beforehand which limitations will be put on the applicability of certain concepts by the extension of our knowledge into the remote parts of nature, into which we can only penetrate with the most elaborate tools. Therefore, in the process of penetration we are bound sometimes to use our concepts in a way which is not justified and which carries no meaning. Insistence on the postulate of complete logical clarification would make science impossible. We are reminded... of the old wisdom that one who insists on never uttering an error must remain silent.