I was in a deli this evening, and took part in the following conversation with a frantic girl who had some kind of British accent (or possibly Australian, it was hard to tell because the conversation was so brief and rushed):
Girl: (to clerk) Are these corn chips?
(he doesn't respond)
Girl: (to me) Are these corn chips?
(she waves the package in my face)
me: Those are flour.
Girl: Are they corn chips?
Girl: How will I know if they're corn chips?
me: It'll say "corn" on it.
Then she ran back to the shelves to find corn chips.