| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 745-745 | External disk drive is disjoint from internal hard disk |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 743-744 | |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 742-742 | External disk drive is a subclass of disk drive |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 748-748 | External hard disk drive is a subclass of external disk drive |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 64840-64840 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners