My personal favorite has always been permutation sort, where you try all possible permutations of a sequence and check if it is sorted. What's nice about it is

My personal favorite has always been permutation sort, where you try all possible permutations of a sequence and check if it is sorted. What's nice about it is that it is deterministic yet ridiculously slow. It can also be really easily implemented in Prolog[1] where you simply define what a permutation and being sorted means. After that you just search for a sorted permutation. [1] http://rosettacode.org/wiki/Sorting_algorithms/Permutation_sort#Prolog http://rosettacode.org/wiki/Sorting_algorithms/Permutation_s...