Are copyright holders being robbed by professors that answer their students' questions? Don't teachers do the same? - Trained their minds on existing books -

Are copyright holders being robbed by professors that answer their students' questions? Don't teachers do the same? - Trained their minds on existing books - Tutor the next generation of students - Give classes on book contents - Answer questions about those books The book publishing industry didn't go out of business because there are teachers answering questions. To the contrary, it benefited book sales, because most people aren't good self-learners. What's wrong with having a machine do the same?