To put my ideas simply:
I dont think Open-mindedness means that you think that you are wrong, its more like that you have your therories and i deas but if something else or some other idea is proven to be better or meor accutrate that yours that you would be willing to recognize and accept that idea. you can still belive strongly in your ideas and be open minded, as long as, with sufficient proof, you are willing to change them.
to me open-mindedness is a great thing.
and also, to me close-mindedness is when you do not even consider anyone else's ideas on the basis that you know you must be right.