thorny, that makes excellent sense! Thank you. Also in logic exercises I have encountered the phrase ‘probatum est’ (meaning, I think, something like ’it is proven’ or ‘tested’, as in the ‘proof of an equation or an experiment’ when such an interaction of rules and exceptions has been demonstrated?
Also, anent books, a friend has given me a copy of one of Rosanne Hawke’s other books: ‘Wolf Child’, which is a book for older children and young adults, an historical fantasy covering the inundation of Lyonnesse. It is a story about survivors of that flood, and one of the survivors is a child peripheral to the story of Tristan and Isolde. Good book if you like Cornish history and folklore, which I do, some of the Tasmanian and Bass Strait Islands branch of my family having come from there. She is a good and interesting writer whose work I will definitely share with the children I know!