There are 2 kinds of people;
-The people who either believe or disbelieve things based on emotion/logic(same thing, since the conclusion is a belief, this means the logic is purely directed by emotion since the extent of the logic used to gather information is based on the extent of your emotional connection to the need to figure out more... this process which will be guide towards the conclusion of either be left open to possibility, or closed to an unconditional belief- the latter being the more illogical one. These people are easily manipulatable, you can mold your opinions in their heads by simply giving your one sided version of the story to convince them... When the opinion reaches the majority, it now becomes the standard.
-OR.... the people who are on a more open minded spectrum, more need for more information is the emotional drive for the thinking process. On the farther side of the spectrum... some people can become so open minded to drift into the infinity and be labelled insane, but the more grounded ones are labelled geniuses.
and so the person with more emotional need to find out more information could be perceived as more open minded.
And the person who doesn't not feel the need to have much information to have a belief can be considered closed minded