David Perry

I actually once sat at the back of a payroll class in America - just me and 40 women! And I'm sitting back there, learning payroll, because I want to understand it. So that when I talk to people about payroll I know what they're talking about. And I set up and managed and ran a full payroll system myself.

The power of Facebook is not only in the vast size of the connected audience, but also in the quality of the social ties and interactions that occur within the network. The Facebook social graph fuels our mantra 'Try it for free', 'Share it if you like it', 'Buy it if you love it.'

When I have a creative insight, there is a high. I think back in the day, I made music as much as I did because it made me feel so good. I think you could argue that there is a creative addiction - but, you know, the healthy kind.

But if, on the other hand, we should be justified in rejecting it, if there testified on oath, then, supposing our rules of evidence to be sound, we may be excused if we hesitate elsewhere to give it credence.