I’ve been downstairs at the cottage most of the evening struggling with the Downstairs Laptop. (Peter played bridge tonight so I came back here from Almost Sacred Wednesday Bell Practise*). I don’t feel it has any call to be as tiresome as it has chosen to be tonight, but I have one or two moral imperatives left and one of them says that you don
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No, it doesn't seem to!!
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"For sets with more than four items, the number of possible permutations is greater than 100, and listing all permutations is clearly a task suitable for computers rather than humans."
And I thought, Oh, that's nice.
Then we get to the end of the section, and there's a note:
"Permutations occur in many contexts . . . even in English bell ringing. The goal in English bell ringing, called change ringing, is to ring all permutations on however many bells are in the tower. Fortunately, most towers have at most 8 or 10 bells."
To which I go, Wait, hang on - what about that bit earlier on where we said that numbers bigger than four were impractical?
So I can now figure out how many different permutations get rung in a tower with 8 or 10 bells, but I don't think I will unless you really want to know. It would be a scary number.
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