1.Computersareunreliable,buthumansareevenmoreunreliable., 2.Atthesourceofeveryerrorwhichisblamedonthecomputeryouwillfindatleasttwohumanerrors,includingtheerrorofblamingitonthecomputer., 3.Anysystemwhichdependsonhumanreliabilityisunreliable., 4.Undetectableerrorsareinfiniteinvariety,incontrasttodetectableerrors,whichbydefinitionarelimited., 5.Investmentinreliabilitywillincreaseuntilitexceedstheprobablecostoferrors,oruntilsomeoneinsistsongettingsomeusefulworkdone., 6.Theonlydifferencebetweenafoolandacriminalisthatthefoolwillattackasystemunpredictablyandonabroaderfront., 7.Asystemtendstogrowincomplexityinsteadofsimplicity,untiltheresultingunreliabilitybecomesintolerable., 8.Self-checkingsystemstendtohaveacomplexityinproportiontotheirinherentunreliability., 9.Theerror-detectionand-correctioncapabilitiesofanysystemserveasakeytounderstandingthetypesoferrorsitcannothandle., 10.Allrealprogramscontainerrorsuntilprovedotherwisewhichisimpossible.