Book Review- Where Good Ideas Come From

My brief thoughts on reading this book:

New ideas arise from a synthesis of ideas, usually from unrelated disciplines. They do not just come out from a vacuum.

Connection of ideas within a body of ideas require a reasonably large body of ideas to start with, and the body of ideas must continually expand, hence requiring continuous learning.

But since the existing store of human knowledge is so vast, we. need to pick our spots. Distant ideas are more difficult to connect than adjacent ideas. Looking back, most if not all of my profitable ideas arose because of a synthesis of prior work. 

Relates back to circle of competence.