| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 767-767 | |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 766-766 | Floppy disk drive is a subclass of disk drive with removable disks |
| appearance as argument number 2 |
|
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| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 768-768 | Floppy disk drive reads or writes floppy disk |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 64874-64874 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners