| PlayingCard(playing card) |
| appearance as argument number 1 |
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| (subclass PlayingCard GameArtifact) | Mid-level-ontology.kif 18691-18691 | Playing card is a subclass of game artifact |
| (subclass PlayingCard ContentBearingObject) | Mid-level-ontology.kif 18692-18692 | Playing card is a subclass of content bearing object |
| (documentation PlayingCard EnglishLanguage "A small piece of stiff paper with markings which is intended to be used for playing card games.") | Mid-level-ontology.kif 18693-18694 | Playing card is a subclass of content bearing object |
| appearance as argument number 2 |
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| antecedent |
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| (=> (instance ?C PlayingCard) (material Paper ?C)) |
Mid-level-ontology.kif 18696-18698 | If X is an instance of playing card, then X is made of paper |
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