Accepting trial and error means accepting error. It means taking problems in our stride when a decision doesn't work out, whether through luck or misjudgment. And that is not something human brains seem to be able to do without a struggle.

Norway has a relationship with the EU which is very close. It has to accept most EU rules. It has to pay EU membership fees. It has free movement of people just like other EU countries, but it's not actually in the EU.

I am aiming my books at anybody with no economics background.

In many ways, love seems to be totally divorced from economics. But then you realize - well, the stakes are high. This is something that matters to us. We're dealing with scarcity. I mean, if you're dating one person, at the very least, you don't have as much time to date another person. And you may well find that you can only date one person at a time.

If the whole process of learning from failure means discarding stuff that's not working, but in fact, our natural reaction is to keep going, to throw more money behind it, to throw more emotional energy behind it... that's a real problem.

British politicians used to be good at misleading people without actually lying.

There's lots and lots of guys out there. The question is trying to find the right one.