19.3 How do you decide if it's appropriate to use your phone while you are in a face-to-face con- versation with another person? For example, how do you decide whether or not to read or respond to a text, or check a phone message when you are dining with someone else, talking to a salesperson or teller, or otherwise engaged face-to-face with someone else? What criteria do you use when deciding to attend to your messages instead of the person