| OverpopulationIssue(overpopulation issue)
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| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | pictureList.kif 9501-9501 | |
| No TPTP formula. May not be expressible in strict first order. | pictureList.kif 9502-9502 | |
| No TPTP formula. May not be expressible in strict first order. | pictureList.kif 8632-8632 | |
| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6852-6852 | Overpopulation issue is an instance of environmental issue |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 43794-43794 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 43793-43793 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 43792-43792 |
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