Non-Religious Irrational person
How about debating someone who holds a non-religious irrational belief, such as astrology, numerology, etc.?
Possible ideas: Sylvia Browne, One of those guys who can talk to dead people or the author(s) of "The Secret."








Sylvia Browne is religious and often blabbers about how she talks to angels and crap. The Raelians don't believe in gods, and they reject the fact of evolution so they may be a good target.