Indiscernibility

“The passage of Byrd’s motet quoted above is – with allowances for artistry – an indiscernible sequence of length four. Stretched to , it represents the legend that Jesus ascended into heaven. Sir Michael Tippett put a similar indiscernible sequence of length three at the climax of the closing spiritual in his oratorio A child of our time, set to the words ‘Walk into heaven’”.

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Excerpt from “Model theory” by Wilfrid Hodges, other epigraphs also worth reading/seeing.