• “Reliable System” as a legal term and as a technical term

    Documents are increasingly being created and used in electronic form. Trade documents with legal import are no exception. The UK Electronic Trade Documents Act 2023 defines what such a document is, and requires it be produced by a “reliable system”. But “reliable system” is a concept of engineering, and has been for decades (I have…

  • Horizon articles in the DEESLR journal and relevant handbook material

    Retired barrister Stephen Mason has been writing, editing and maintaining a legal practitioner’s handbook on electronic evidence since 2007. The latest edition, Stephen Mason and Daniel Seng (eds.), Electronic Evidence and Electronic Signatures, University of London Press, 2021, is available open-access at https://uolpress.co.uk/book/electronic-evidence-and-electronic-signatures/ Stephen was also editor until 2024 of the open-access journal Digital Evidence…

  • Addressing the common law Presumption of computer reliability is a separate issue from addressing failure of disclosure

    The Post Office Horizon scandal has highlighted two issues in the law of England and Wales. The first is that there is a common law Presumption (I use a capital “P” henceforth) that devices, including computer systems, are operating correctly unless there is evidence to rebut this assumption. The second is that evidence that would…

  • Andrew Odlyzko on Cybersecurity not Being a Big Deal

    1. In 2019, Andrew Odlyzko published a paper in ACM Ubiquity in which he argued that cybersecurity was not as big a deal as some prognosticators had claimed http://www.dtc.umn.edu/~odlyzko/doc/cyberinsecurity.pdf There are a number of insights, as well as some questionable arguments. I find it worth commenting. Paragraphs are numbered. I abbreviate the author’s name to AO.…

  • Computer Reliability in Legal Arguments, with Some Observations about Arguments

    The cybersecurity and public policy expert Susan Landau has published an article in the Lawfare blog about Problems with Evidentiary Software in English and US courts; the attitudes of English and US courts towards the evidence generated by, or about the behaviour of, computers in cases they consider. She uses the Post Office Horizon affair as the English…

  • Concerning an Odd Comment on Covid-19 Vaccination

    The Observer is one of Britain’s oldest newspapers. It is published Sundays (effectively as the Sunday edition of The Guardian). Its science and environment editor Robin McKie has an article about vaccination and “political folly”  He considers the brouhaha surrounding Covid-19 Vaccine AstraZeneca (as it is now called. It used to be AZD1222. I shall call…

  • Glimpses of Reason Concerning Vaccination

    The German nonsense is unfortunately continuing, but is yielding some. The influential Minister-President of Bavaria (Bayern), Marcus Söder, had suggested that the over-65 negative recommendation for AZD1222 should be waived; he was joined by the MinPres’s of Baden-Wurttemburg,  Hesse (Hessen), and Saxony (Sachsen). See this story from Sunday 2021-02-28.  Those states represent 41.5% of the German…

  • Vaccination and Memes Around AZD1222 Reluctance in Germany

    A British colleague wrote to me a couple days ago about a newspaper story concerning “a vaccination centre in Berlin that had 3000 people booked in one day, but only a couple of hundred turned up.” Our vaccination centre in Bielefeld was ready to handle up to 2,000 vaccinations per day in mid-December, but only…

  • Covid-19, Safety Critical Systems Club Activity, Air Filtering

    It has been over a year since I have written anything here. I have been concerned with reading myself in the medical-scientific and public health literature about SARS-CoV-2 and Covid-19, because the deleterious consequences of this pandemic dwarf anything we system safety people have had to deal with during my career. Many believe that engineers…

  • The Usual Dilemma – Soliciting Information versus Ascribing Responsibility

    The usual dilemma has surfaced in the Grenfell Tower inquiry. I must say I was expecting it to do so at some point. https://www.theguardian.com/uk-news/2020/jan/30/people-who-worked-on-grenfell-tower-could-face-life-sentences The dilemma in its current form amounts to this. 1. Civil engineers, regulators and others involved with buildings want to find out causally what went on during building and refurbishment of…

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