https://www.cambridge.org/core/journals/royal-institute-of-philosophy-supplements/article/abs/episodic-ethics/B376278153E1558D54D00E204D1965D3#
See also
https://oxford.universitypressscholarship.com//mobile/view/10.1093/acprof:oso/9780199267422.001.0001/acprof-9780199267422-chapter-9
