| Surfboard | | surfboard |
| appearance as argument number 1 |
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| (documentation Surfboard EnglishLanguage "A narrow buoyant board for riding surf.") | Sports.kif 176-176 | |
| (subclass Surfboard WaterBoard) | Sports.kif 175-175 | Surfboard is a subclass of water board |
| antecedent |
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| (=> (instance ?X Surfboard) (hasPurpose ?X (exists (?S) (and (instance ?S Surfing) (instrument ?S ?X))))) |
Sports.kif 178-184 |
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