THE FROM “IS” TO “OUGHT” FALLACY
“Take any action allowed to be vicious; willful murder, for instance. Examine it in all lights, and see if you can find that matter of fact, or real existence, which you call “vice.” In whichever way you take it, you find only certain passions, motives, volitions, and thoughts. There is no other matter of fact in the case… …In every system of morality which I have hitherto met […]