Full Idea
It is ludicrous to say that we might accept an action is outrageously wrong and still think of this as not in itself giving us good reason to hold back.
Gist of Idea
Obviously judging an action as wrong gives us a reason not to do it
Source
Jonathan Dancy (Intuitionism [1991])
Book Reference
'A Companion to Ethics', ed/tr. Singer,Peter [Blackwell 1993], p.415
A Reaction
If we think of some dreadful man-made famine in a remote continent, our judgement may well give a reason to act, but apathy usually intervenes. We are discussing a purely theoretical motive on the one hand, and an actual motivator on the other.