| No TPTP formula. May not be expressible in strict first order. | Media.kif 1153-1153 | Compact disc is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1154-1154 | Compact disc is a subclass of optical disc |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 698-698 | Compact disc is a subclass of removable digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1169-1169 | CDROM is a subclass of compact disc |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1177-1177 | CDR is a subclass of compact disc |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1182-1182 | CDRW is a subclass of compact disc |
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