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.
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.
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.