The Core is a limited series of concise principles, sharing the ideas that sit at the heart of everything I do.

Everyone is bewildered, especially about technology. This leads to people making things up as they go along. It's perfectly natural. We've been doing it since the dawn of time.

Saying "I don't know" is a mark of intelligence, but requires courage.

Saying "I don't know, but I have an idea..." is a superpower.

For leaders, un-bewildering is the job.