| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 4986-4987 | |
| No TPTP formula. May not be expressible in strict first order. | Geography.kif 4984-4984 | Lower low tide is a subclass of low tide |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 35123-35123 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 35122-35122 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 35121-35121 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners