Don't believe me? Allow me to introduce exhibit A, which was published in the January/February 2011 issue of Practical Neurology.
click to enlarge
Because, let's face it: It takes a really special kind of whackjob to write a letter complaining about using both the words "preventive" AND "preventative" in the same article. They even get bonus points for being able to cite an article from freakin' 1964 on such an important point.
p.s. You guys spelled "inconsistency" wrong.