(=> (instance ?C ElectricalConductor) (exists (?S) (and (subclass ?S ConductorSubstance) (material ?S ?C)))) |
engineering.kif 826-831 |
|
(subclass ConductorSubstance Substance) | engineering.kif 1281-1281 | Conductor substance is a subclass of substance |
(subclass Electrolyte ConductorSubstance) | Cars.kif 2495-2495 | Electrolyte is a subclass of conductor substance |