The irrationality of disgust suggests it is unreliable as a source of moral insight. There may be good arguments against gay marriage, partial-birth abortions and human cloning, but the fact that some people find such acts to be disgusting should carry no weight.

Some scholars argue that although the brain might contain neural subsystems, or modules, specialized for tasks like recognizing faces and understanding language, it also contains a part that constitutes a person, a self: the chief executive of all the subsystems.

Morality is often seen as an innovation, like agriculture and writing. From this perspective, babies are pint-sized psychopaths, self-interested beings who need to be taught moral notions such as the wrongness of harming another person.

Part of the satisfaction of tattling surely comes from showing oneself to adults as a good moral agent, a responsible being who is sensitive to right and wrong. But I would bet that children would tattle even if they could do so only anonymously. They would do it just to have justice done.

The only reason I'm in Hollywood is that I don't have the moral courage to refuse the money.

In Canada, good waitresses are tipped well. I learnt that the harder you work, the more money you make.

I am here to give the American people some straight talk about higher education. Some have said we might have cut financial aid for college students. The truth is we have expanded access to college for our neediest students through the record growth of the Pell grant program.

When I went to my first FA Cup final, we had to pack bags in Tesco to raise enough money for a bus to London. Now, I own a house.