| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 317-317 | Up arrow key is disjoint from down arrow key |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 309-309 | Up arrow key is disjoint from left arrow key |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 310-310 | Up arrow key is disjoint from right arrow key |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 307-308 | |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 306-306 | Up arrow key is a subclass of arrow key |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 65668-65668 |
| statement |
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| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 1813-1814 | Pressing the up arrow key key isgnifies the union of vertical window scrolling and window scrolling by user |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 2312-2312 | Pressing the up arrow key key isgnifies selecting active area |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners