I want to know the answer to the following question:
How many different worlds or realities did Popper differentiate in Objective Knowledge?
All the background I'm provided with is that "World Three, he argued, was the product of individual human beings in exactly the same sense that an animal path is the product of individual animals, and that, as such, has an existence and evolution independent of any individual knowing subjects.". Is that enough to answer the question?
Answer: no