| (=> (instance ?C ElectricalConductor) (exists (?S) (and (subclass ?S ConductorSubstance) (material ?S ?C)))) |
engineering.kif 1139-1144 |
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| (subclass ConductorSubstance Substance) | engineering.kif 1594-1594 | ConductorSubstance is a subclass of substance |
| (subclass Electrolyte ConductorSubstance) | Cars.kif 2479-2479 | Electrolyte is a subclass of ConductorSubstance |
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