[notsuoh]

Haha, just pointing out how the term is used in the industry. If you want to really play with semantics then I would argue that even a photo of a real cat isn’t a real cat and thus not ground truth. But while the consequences of that might have the awesome effect of clearing the shelters, it’s not practical, so we just call any labeled pixels representing a cat to a fidelity good enough for our purposes ground truth. ;)