Online text 1976, "Moral Luck", Proceedings of the Aristotelian Society Supplementary vol. 50, pp. 137–55 (repr. in Mortal Questions). 1979, "The Meaning of
(philosophy, movement, school, theory, etc.) The Problems of Philosophy, by Bertrand Russell (links provided to full text) Stanford Encyclopedia of Philosophy
(2015年2月13日). “elementary set theory - Is there any connection between the symbol ⊃ when it means implication and its meaning as superset?” (英語). Mathematics