1. What makes us different from animals Can some animals think

2. Question everything Georg Christoph Lichtenberg

3. I seek not the answer but to understand the question

4. Don Marquis

5. Thought

6. A corollary If no-one is left at the end of my lecture it will have been a great success

7. Science and Doubt © How hard it is to be sure of anything – some doubt must always linger

8. A History of Doubt

9. Is Seeing Believing?

10. Doubt II ©

11. Einstein and the Guy who doesn’t Play Dice ©

12. Spinoza

13. Our Big Problem

14. The Freedom to Doubt and Question

17. Fruits of Conviction

18. The Hitchhiker’s Guide to the Universe

19. What have Philosophers ever done for us?

20. The Foundation of Scientific Philosophy ©