| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Communications.kif 345-346 | |
| No TPTP formula. May not be expressible in strict first order. | Communications.kif 344-344 | Satellite tv is a subclass of communication system |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | Communications.kif 347-347 |
| antecedent |
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| No TPTP formula. May not be expressible in strict first order. | Communications.kif 349-356 |
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