No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25060-25060 | Fixed phone is a subclass of telephone |
No TPTP formula. May not be expressible in strict first order. | Communications.kif 73-73 | Corded telephone is a subclass of fixed phone |
No TPTP formula. May not be expressible in strict first order. | Communications.kif 89-89 | Cordless telephone is a subclass of fixed phone |