| appearance as argument number 1 |
|
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 2071-2073 | |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5725-5725 | Electricity is an industry product type of electrical power generation |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 2069-2069 | Electrical power generation is a subclass of power generation |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 2077-2077 | Hydro electric power generation is a subclass of electrical power generation |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 21534-21534 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 21533-21533 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 21532-21532 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners