I've never ever heard of anyone who was so open-minded that it was a detriment.
Open-mindedness is just a willingness to examine new ideas. Nothing wrong with that.
Well, I don't reject an idea without hearing what it is first. I wouldn't reject an idea just because someone said it was paranormal.
For example, if someone said that it might be possible that there was life on the Sun, would you immediately reject that idea or would you hear it out?
(it's a trick question)
@Pat Well, life on the sun is obviously true :)
@Pat Unless you are examining ideas that have been rejected by evidence and logic for a long time… paranormal phenomena comes to mind… that just seems a silly use of time. Harmless, but wasteful.