naturalistic fallacy

Etymology
Introduced by British philosopher in his 1903 book .

Noun

 * 1) The fallacious belief that something is automatically good because it is natural or automatically bad because it is unnatural.
 * 2) Any attempt to define "good" verbally, instead of treating it as an undefined term, in terms of which other terms are defined.
 * 1) Any attempt to define "good" verbally, instead of treating it as an undefined term, in terms of which other terms are defined.
 * 1) Any attempt to define "good" verbally, instead of treating it as an undefined term, in terms of which other terms are defined.
 * 1) Any attempt to define "good" verbally, instead of treating it as an undefined term, in terms of which other terms are defined.

Usage notes

 * Whether this second usage is a fallacy is disputed.