I want to know the answer to the following question:
Which German psychologist and tutor of Popper may have originated some of Popper's ideas?
All the background I'm provided with is that "Hark (Groningen, The Netherlands) published a book, called Popper, Otto Selz and the rise of evolutionary epistemology, in which he claimed that Popper took some of his ideas from his tutor, the German psychologist Otto Selz.". Is that enough to answer the question?
Answer: yes