Quote Originally Posted by Soulforged
I agree with you, but wouldn't that mean that the definition by Fischl doesn't apply in this case? (look at the bolded fragment)
I don't think so. The subject matter is immediately clear, it even says what it is. You see an image of a pipe and the warning 'this is not a pipe', in other words: 'This image is not about reality, it is about artsy pipe ideas inside you head.'