I fully agree that you can't argue with irrationality, but not all of those that I encounter are irrational. Many have simply never looked at the question in any level of detail because they believe that science has already proven the case. It is only for these people that any semblance of science and reasoning will work.

For those that are irrational, perhaps you can use NLP or something similar with them, but personally I prefer to ignore others that can't even structure some simple logical reasoning. They are not the real influencers of others in any case. I believe that the time you take in educating others is best spent on the 10% that can think and can influence others, and the other 90% should simply be left alone. The other 90% will only frustrate you in any case.