I was out with a friend, Joan and another friend of hers, Michelle and we ended up in a little antigue shop just browsing. Michelle and I were looking at some odds and ends which included a couple of nice iron pieces.
Michelle: I have a few wrought iron things at home and am thinking about collecting them.
Me: (Without thinking) It's cast.
Me: This is cast iron, not wrought iron.
Michelle: It is not! Cast iron is for pots and frying pans.
Me: (blink, blink) Oh, look at that nice chair.
Given her tone, Michelle...TheOneWhoKnowsEverything....was not in the mood to hear about the various methods of iron work, and frankly, I don't care if she knows the difference.