How do you do?” depending on the formality of the occasion, and whether you can count on the other person to understand that the answer to “How do yo… - Judith Martin

"The President of the United States is addressed by nickname (his or his enemies') before the election and "Mr. President" after taking office. Everybody else in Washington is styled "The Honorable" to make up for what everybody outside of Washington calls them."

Miss Manners’ meager arsenal consists only of the withering look, the insistent and repeated request, the cold voice, the report up the chain of command and the tilted nose. They generally work.

"DEAR MISS MANNERS:
Should you tell your mother something if it is important when she is talking to company? I am six.

GENTLE READER:
Yes, you should (after saying "Excuse me"). Here are some of the things that are important to tell your mother, even though she is talking to company:
"Mommy, the kitchen is full of smoke."
"Daddy's calling from Tokyo."
"Kristen fell out of her crib and I can't put her back."
"There's a policeman at the door and he says he wants to talk to you."
"I was just reaching for my ball, and the goldfish bowl fell over."
Now, here are some things that are not important, so they can wait until your mother's company has gone home:
"Mommy, I'm tired of playing blocks. What do I do now?"
"The ice-cream truck is coming down the street."
"Can I give Kristen the rest of my applesauce?"
"I can't find my crayons."
"When are we going to have lunch? I'm hungry.