בתמונה ויליאם ג'ון קנת דיפלוק, ברון דיפלוק
By "irrationality" I mean what can by now be succinctly referred to as "Wednesbury unreasonableness" (Associated Provincial Picture Houses Ltd. v. Wednesbury Corporation [1948] 1 KB 223). It applies to a decision which is so outrageous in its defiance of logic or of accepted moral standards that no sensible person who had applied his mind to the question to be decided could have arrived at it. Whether a decision falls within this category is a question that judges by their training and experience should be well equipped to answer, or else there would be something badly wrong with our judicial system. To justify the court's exercise of this role, resort I think is today no longer needed to Viscount Radcliffe's ingenious explanation in Edwards v. Bairstow [1956] AC 14 of irrationality as a ground for a court's reversal of a decision by ascribing it to an inferred though unidentifiable mistake of law by the decision-maker. "Irrationality" by now can stand upon its own feet as an accepted ground on which a decision may be attacked by judicial review.
לקוח מתוך פסק דין Council of Civil Service Unions v Minister for the Civil Service [1984] UKHL 9
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