[zokier]

But red delicious is still definitely apple. I can definitely understand why someone would not prefer red delicious apples or iceberg lettuce, but that is quite different from claiming that iceberg lettuce isn't really a lettuce.

[rmunn]

Which is why I put (facetiously) in my original comment. I'm perfectly aware that iceberg is really lettuce, and what I'm doing is making a "no true Scotsman" argument. It's all for fun. If I was being serious, I would define a new category, let's call it "tasty lettuce", which is a subset of lettuce and which iceberg should not be included in IMHO. But it's more fun to say something obviously incorrect but which conveys my meaning in ordinary conversation.