Common sense principle

I'm just wondering if there is such a thing as common sense any more. Too often it seems to me that people love to get hung up in debate over secondary elements, and if we simply apply the principle of common sense the answers will be clear.

I recently heard someone tell me that when a person will not respond to logic or common sense, there is something they are not telling you that blinds them to both. That helps in dealing with the frustration, but not the irritation I always feel when I find out someone has a hidden agenda.

Politicians are the worst for this, aren't they?