The debate went on for at least ten minutes ...

"It's a sofa!", she said.

"It's a couch!", he said.

"A SOFA!", she howled (and, boy, can she howl).

"A couch!", he said, my middle son remaining more calm just to get her goat.

"SOFA!!"

"COUCH!"

To break the tension, I yelled from the kitchen, "In some places, it's called a davenport."  This produced some "What?" inquiries and laughter.

Middle son came into the kitchen to wash up for a snack.  He laughed and said, "Davenport!"  I said it sounded like a place in Michigan.  "It's in Iowa, actually", he said.

Bummer.  Another stupid Mom moment.  I hate it when that happens.

Sometimes ... I wish they didn't know so much!