It's hard to know where to start a conversation with Professor Tshilidzi Marwala.

Do you begin with his role as deputy chair of the Presidential Commission on the Fourth Industrial Revolution (4IR)? Or do you start with his role as vice-chancellor and principal of the University of Johannesburg (UJ), and his efforts to ensure graduates are equipped with the skills to thrive in the digital economy? You could start by discussing the 16 books he’s written, including a book for children on artificial intelligence.