"This is a shortened version of a speech that the author was due to give last month at King’s College London which was canceled because the university deemed the event to be too ‘high risk’."
It includes a good quote:
Read the utterly innocuous but useful piece. How the idea of debating scientific theories could be "high risk" is beyond me. Or maybe the very phrase "free speech" triggers people. If so, I feel depressed.
Science is not about finding the truth at all, but about finding better ways of being wrong. The best scientific theory is not the one that reveals the truth — that is impossible. It is the one that explains what we already know about the world in the simplest way possible, and that makes useful predictions about the future. When I accepted that I would always be wrong, and that my favourite theories are inevitably destined to be replaced by other, better, theories — that is when I really knew that I wanted to be a scientist.