| No TPTP formula. May not be expressible in strict first order. | Cars.kif 91-91 | Intermittent combustion engine is a subclass of internal combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 96-96 | Four stroke engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 240-240 | Two stroke engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4548-4548 | Two cylinder engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4556-4556 | Four cylinder engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4564-4564 | Six cylinder engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4572-4572 | Eight cylinder engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4865-4865 | Mini engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4977-4977 | Chevrolet engine is a subclass of intermittent combustion engine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 5172-5172 | Cosworth engine is a subclass of intermittent combustion engine |
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