That's easy: Your purchase decision is driven by what you'd like to know rather than what you're willing spend the effort to learn. Reading requires active ef

That's easy: Your purchase decision is driven by what you'd like to know rather than what you're willing spend the effort to learn. Reading requires active effort. Until we develop "I know kung fu" [1] technology, any substitutes for books will likely also require more effort than just an initial purchase. [1] https://www.youtube.com/watch?v=6vMO3XmNXe4 https://www.youtube.com/watch?v=6vMO3XmNXe4