Full Idea
All uses of the truth predicate are explained by the hypothesis that its entire raison d'être is to help us say things about unarticulated propositions, and in particular to express generalisations about them.
Gist of Idea
Truth is a useful concept for unarticulated propositions and generalisations about them
Source
Paul Horwich (Truth (2nd edn) [1990], Concl)
Book Reference
Horwich,Paul: 'Truth (2nd edn)' [OUP 1998], p.118
A Reaction
This certain is a very deflationary notion of truth. Articulated propositions are considered to stand on their own two feet, without need of 'is true'. He makes truth sound like a language game, though. Personally I prefer to mention reality.