Apparently some people never learned that:

1. Having an open mind is extremely important.
If you don't have an open mind then you don't try new things. When you don't try new things then it is logically impossible to improve, or to move on, or to do ANYTHING. Every single technological, creative, scientific advancement was a result of trying something new; it's not profound, it's very simple.

2. Using logic is extremely important.
If you don't investigate or use logic then you won't be able to tell what to accept or reject. It means you have absolutely no way to navigate through a mess of information; you have no control, you don't know what's true or what's not true, you don't have the mental faculties to reach your own goals.

If a person can't reach the level of understanding just to establish those two BASIC things, I don't know what to say. If a person thinks those two things aren't important, then they're wrong. However you can't prove it to them because they already won't listen to logic, which is their basis for not liking it.