Cool! One little thing is that you would expect that the is_anagram relation is a symmetrical one. I.e. that "neo" is an anagram of "one" then "one" is also an

Cool! One little thing is that you would expect that the is_anagram relation is a symmetrical one. I.e. that "neo" is an anagram of "one" then "one" is also an anagram of "neo", which doesn't seem to be the case with you system. Why is that?