Got the same problem with my mom. (See no truth, Hear no truth, Speak no truth)
She's not sure why she believes what she believes, but she'll defend it to the death; unfortuantely.
If you find a chink in their armor, send me a FReepmail.
thanks
Becky
The ONLY thing that I have seen work is to set youreslf as an admirable example. Badgering, lecturing, pleading, debating, etc do not work. You need to be a perfect example of what you want them to become. You need to make yourself into someone they want to be like. IMHO