Same here. I never realized until I read an article about it well in my fourties. I read the late Wittgenstein when I was twenty, and I also thought that thing

Same here. I never realized until I read an article about it well in my fourties. I read the late Wittgenstein when I was twenty, and I also thought that thing with "the meaning of a dog is a mental image of a dog" was a metaphor. He quotes this somewhere to criticize it iirc.