Here "meaningful order" is: if elephant "a[i]" is smarter than elephant "a[j]" then "i" must be strictly less than "j"
Of course, to the same effect we could sort them simply by sizes, but then time of sorting would increase by ~ 2 times -- due to decreasing of number of equally smart things. But here it does not matter -- for my initial question. I like all above explanations. Especially that by Chris Rebert. -- http://mail.python.org/mailman/listinfo/python-list
