How in the world should that be considered close minded? It is close-minded to suggest that there is no such thing as a paranormal event, which is what you guys are doing.
Depending on the nature of the event it would be easy to tell.
Why do you keep saying that? No one has suggested that there is no such thing as a paranormal event. No one.
However when you say you KNOW an unexplained event IS paranormal, you are being close minded because you have no evidence to prove it yet you KNOW (saying with certainty) that it's paranormal. That is close minded.