"I wouldn't want to show up at box-cutter fight carrying a butter knife."
How about with a 'butter knife' that's over five inches long with a serrated edge? Remember this lady is the one that characterized this as a 'butter knife'. You don't think that facing a criminal action, she might have some reason to understate the facts?
Our family's butter knives have serrated edges, too. The serrations are small though and yet could still be classified as a "knife of over five inches long with a serrated edge."