It is likely there is nothing you can do or say. It seems people are wired differently in how they consider problems - some people are more analytical, some people are more intuitive.
There are some models for rational thinking:
The Debunking Handbook:
http://www.skeptic.com/doubtful-news...ng-handbook-2/
Refuting misinformation involves
dealing with complex cognitive
processes. To successfully impart
knowledge, communicators need
to understand how people process
information, how they modify
their existing knowledge and how
worldviews affect their ability to
think rationally. It’s not just what
people think that matters, but how they think.
The Top 20 Logical Fallacies:
http://www.theskepticsguide.org/reso...fallacies.aspx
The Red Flags of Quackery:
http://sci-ence.org/red-flags2/
http://www.sciencebasedmedicine.org/...ased-medicine/
Science-Based Medicine is dedicated to evaluating medical treatments and products of interest to the public in a scientific light, and promoting the highest standards and traditions of science in health care. Online information about alternative medicine is overwhelmingly credulous and uncritical, and even mainstream media and some medical schools have bought into the hype and failed to ask the hard questions.
We provide a much needed “alternative” perspective — the scientific perspective.
http://www.quackwatch.com/
Quantum healing:
http://www.skepdic.com/chopra.html
Fraud: SCIO Quantum Wellness device
http://mybroadband.co.za/vb/showthre...ellness-device
MIRACLE MACHINES:The 21st-Century Snake Oil
http://seattletimes.nwsource.com/html/medicaldevices/
They cure cancer, reduce cholesterol, even eliminate AIDS. Their operators say these "energy medicine" devices work by transmitting radio frequencies or electromagnetic waves through the body, identifying problems, then "zapping" them. Their claims are a fraud. The Seattle Times has found that thousands of these unproven devices — many of them illegal or dangerous — are used in hundreds of venues nationwide.
Pair indicted on fraud charges in medical-device probe
http://seattletimes.nwsource.com/htm...ctment21m.html
The Quack Clinic Checklist
http://www.randi.org/site/index.php/...checklist.html