(=> (instance ?COIN CurrencyCoin) (exists (?METAL) (and (subclass ?METAL Metal) (material ?METAL ?COIN)))) |
Mid-level-ontology.kif 3600-3605 |
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(=> (and (instance ?SKI SnowSki) (material ?MAT ?SKI)) (or (subclass ?MAT Metal) (subclass ?MAT Wood) (subclass ?MAT Plastic))) |
Sports.kif 1040-1047 |
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(subclass Metal ElementalSubstance) | Merge.kif 1101-1101 | Metal is a subclass of elemental substance |