| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3866-3866 | Magnet 是 客体 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3880-3880 | NaturalMagnet 是 Magnet 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3886-3886 | Electromagnet 是 Magnet 的 subclass |
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