Our friends over at Apologetics315 have posted a top seven list of “no-no’s for relativists” that were written in an article by Greg Koukl. These statements become self defeating when a relativist argues his position, so it’s a good idea to go over them and listen for them in conversation.
http://www.apologetics315.com/2015/11/the-top-7-things-you-cant-do-as-moral.html