Full Idea
If you want to recognise the truth of some moral judgements, perhaps to make room for the possibility of moral mistakes, then one may not be satisfied with the emotivists' tendency to appeal to the redundancy theory of truth.
Gist of Idea
Emotivists tend to favour a redundancy theory of truth, making moral judgement meaningless
Source
David O. Brink (Emotivism [1995], p.224)
Book Reference
'Cambridge Dictionary of Philosophy', ed/tr. Audi,Robert [CUP 1995], p.224
A Reaction
Probably thinking of Simon Blackburn. People who adopt a redundancy view of truth for semantics are left floundering when discussing what is true in the rest of philosophy.