| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 753-754 | |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 752-752 | Disk drive with removable disks is a subclass of disk drive |
| appearance as argument number 2 |
|
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| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 757-757 | Cartridge hard disk drive is a subclass of disk drive with removable disks |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 766-766 | Floppy disk drive is a subclass of disk drive with removable disks |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 64771-64771 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners