When a person presents a message in a formal manner, he or she is engaging in public communication.
Public communication refers to the type of communication wherein a message is presented by one person or a group to another group in a formal manner. In a public sphere, the individuals or group engage in a dialogue to deliver a message.
Without an open mind, you have no ability to change what you think. therefore you cannot and will not have any type of willingness to consider others ideas.