<p>And another thing: even if you’re on a first-name basis with somebody, don’t assume it’s OK to call them by a nickname or diminutive, even if you hear somebody else using it. He may be “Jack” to his close friends, but still “John” to you.</p>
<p>And another thing: even if you’re on a first-name basis with somebody, don’t assume it’s OK to call them by a nickname or diminutive, even if you hear somebody else using it. He may be “Jack” to his close friends, but still “John” to you.</p>