Philosophy / Philosophy 0266 · Atom · ~20 seconds
The Is-Ought Gap
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State
Hume's is-ought gap: no set of purely factual premises entails a normative conclusion—somewhere, an "ought" premise must be supplied.
Show
"Smoking causes disease, therefore you should quit" hides a premise: you ought to avoid disease. State it, and the argument is honest.
Watch for
The gap does not make ethics arbitrary—it makes the ought-premises the part worth debating.