Editor's Note 1. The Indefinables of Logic 2. Objective Validity of the Laws of Thought 3. Identity 4. Identity of Classes 5. Ethical Application of the Law of Identity 6. The Law of Contradiction in Modern Logic 7. Symbolism and Meaning 8. Nominalism 9. Ambiguity and Symbolic Logic 10. Logical Addition and the Utility of Symbolism 11. Criticism 12. Historical Criticism 13. Is the Mind in the Head? 14. The Pragmatist Theory of Truth 15. Assertion 16. The Commutative Law 17. Universal and Particular Propositions 18. Denial of Generality and Generality of Denial 19. Implication 20. Dignity 21. The Synthetic Nature of Deduction 22. The Mortality of Socrates 23. Denoting 24. The 25. Non-Entity 26. Is 27. And And Or 28. The Conversion of Relations 29. Previous Philosophical Theories of Mathematics 30. Finite and Infinite 31. The Mathematical Attainments of Tristram Shandy 32. The Hardships of a Man with an Unlimited Income 33. The Relations of Magnitude of Cardinal Numbers 34. The Unknowable 35. Mr. Spencer, the Athanasian Creed, and the Articles 36. The Humour of Mathematicians 37. The Paradoxes of Logic 38. Modern Logic and some Philosophical Arguments 39. The Hierarchy of Jokes 40. The Evidence of Geometrical Propositions 41. Absolute and Relative Position 42. Laughter 43. Gedankenexperimente and Evolutionary Ethics. Appendixes
