No TPTP formula. May not be expressible in strict first order. | ComputingBrands.kif 90-90 | Phone OS is a subclass of operating system |
No TPTP formula. May not be expressible in strict first order. | ComputingBrands.kif 28-28 | Android is a subclass of phone OS |
No TPTP formula. May not be expressible in strict first order. | ComputingBrands.kif 84-84 | IOS is a subclass of phone OS |