| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | engineering.kif 875-876 | |
| No TPTP formula. May not be expressible in strict first order. | engineering.kif 877-877 | |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 26361-26361 | Three phase power source is a subclass of ac power source |
| No TPTP formula. May not be expressible in strict first order. | engineering.kif 878-878 | Three phase power source is a subclass of power source |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 57908-57908 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 57907-57907 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 57906-57906 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners