My point is that perceptual bias can affect nut jobs and scientists alike. If we hold too rigidly to what we think we know we ignore or avoid evidence of anything that might change our mind.

There is at least one point in the history of any company when you have to change dramatically to rise to the next level of performance. Miss that moment - and you start to decline.

That's the thing about interviews at some point you're going to change your mind. But it's there forever and you can't escape it.

People's view of cancer will change when they have their own relationship with cancer which everyone will at some point.

There is no question that climate change is happening the only arguable point is what part humans are playing in it.

Climate change was a point of division between Obama and Republican rival Mitt Romney. The president declared climate change a global threat acknowledged that the actions of humanity were deepening the crisis and pledged to do something about it if elected.

The biggest danger to the European Union comes not from those who advocate change but from those who denounce new thinking as heresy. In its long history Europe has experience of heretics who turned out to have a point.

I don't have clear-cut positions. I get baffled by things. I have viewpoints. Sometimes they change.

We think that democracy can change a lot of things but we're being fooled because democracy is not the election. We've been taught that democracy is having elections. And it isn't. Elections are the most horrendous aspect of democracy. It's the most mundane trivial disappointing dirty aspect.

Vengeance is not the point change is. But the trouble is that in most people's minds the thought of victory and the thought of punishing the enemy coincide.