> as long as the number of cards in it is not divisible by three or is equal to three
I'm curious about the distinction here. Is it needed? Isn't N divisible by N? Or is there a mathematically-meaningful difference?
I'm curious about the distinction here. Is it needed? Isn't N divisible by N? Or is there a mathematically-meaningful difference?
as example: the library has 6 cards; the spell allows you to choose the top 3 cards and put them into the bottom in any order. So the spell only allows you to sort either the first set of 3 or the second set of 3 top cards, and there is no way to intermix the cards from the two sets of three => no way to sort the entire library.
Hope this make senses as to why N=3 is an exception as well!