Can there really be a genuine meeting of minds?

The first guy on the left you don't dare question or he's going to blow up.

The middle guy needs a key to unlock but he's hidden it.

The guy on the rightneeds the perfect combination you'll probably never guess.

Which one are you trying to converse with right now and it just doesn't seem to be working?

I've come to the conclusion that argument and debate rarely changes anyone's mind. My observations, of my own life and the lives of others, is that it usually takes some kind of trauma to change one's mind. My question is... is this necessarily the only way? Or can we be changed by a new thought?