| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Languages.kif 1091-1103 | |
| No TPTP formula. May not be expressible in strict first order. | Languages.kif 1090-1090 | Russian sign language is an instance of deaf sign language |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 50667-50667 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 50666-50666 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 50665-50665 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners