If, like me, you are a salesperson, then you have some experience of people who are rigid in their ideas, and how hard it can be to change them. Merely providing new data doesn't usually work. A bit of a shame that, but people tend to view what they know already as more reliable - for obvious reasons when you think about it - and the more time they spent acquiring that knowledge, the more weight they apply.
If you have ever had to change your mind about something - and I sincerely hope you have, since continuous perfection is unlikely - then you may also know how hard that it is. So this article on getting stuck in your ways is a great thing to read if you want to explore new ideas, and learn more about how to change your own mind and the mind of others. Link.