Well... I have a friend who's uber logical, scientist, atheist, doesn't believe in anything without proof. It's kind of hilarious because I am sort of psychic, read Tarot, talk to trees and faeries, and I live in a haunted house (she does not believe in psychics, ghosts, and I'm not quite sure of her opinions on how well trees can communicate).
We've uh... obviously clashed a couple of times. Our most recent debate I ended up getting the last word (you have no idea how hard that is when it comes to her). She told me that the only way Tarot worked, and was using this an example why it shouldn't be taken seriously, was because people associated with the symbols of the cards and made it work for their situation, or the sitter's situation.
I told her that is indeed how Tarot works (plus using your intuition), that there is nothing magical about it, that if she was going to use one of the ways it works as an excuse to not believe it than obviously there are going to be problems... of course, I used three big paragraphs to say this, but that's the shortened version.
Her reply? "Oh, I just heard it was supernatural from other people, if that's how it works I don't have a problem with it."
I do believe that there is something more when it comes to Tarot, but hey... she's the most ultimate skeptic I'm friends with, I was trying to explain it in a way that she was going to understand and believe. And I think I succeeded!
(but no, seriously, I've only been able to shut her up twice... this is the second time)