Questorming: exploring the unknown unknowns
swombat.com
swombat.com
The only real way to learn about unknown unknowns other than smacking into them hard is to talk to someone in tbd field. It's the fastest most efficient way.
Relying on linguistic mapping of previously known relationships is a poor system for discovering unknown unknowns. talking to someone in that space is orders of magnitudes more efficient.
The book example is just an example. There are lots of materials out there about writing books, so using Questorming to explore this is indeed a waste of time, but it provides a useful example.
To really figure out unknown unknowns for a business model, you should be talking to the people who are already in the market, customers or reading trade literature.
Sitting around in a room alone doing this is probably a just a huge waste of time.