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nplies [1, 3, = or3] (5] no contradiction Exercise 3.6 Demonstrate the validity or otherwise of the following inferences proof. In each question the inferences are written irst followed using indirect tions which are taken from a system specification. (i) old new (ii) old nexth new, next (iii) normal OffLine old new old new OnLine v OffLine, OnLine on V directory normal hive normal, normal directory (v) LineDow-ready LineOkv LineDown, lineOk message v ready nplies [1, 3, = or3] (5] no contradiction Exercise 3.6 Demonstrate the validity or otherwise of the following inferences proof. In each question the inferences are written irst followed using indirect tions which are taken from a system specification. (i) old new (ii) old nexth new, next (iii) normal OffLine old new old new OnLine v OffLine, OnLine on V directory normal hive normal, normal directory (v) LineDow-ready LineOkv LineDown, lineOk message v ready