Full Idea
Being true is not a relation. …Being true is a monadic property. …Being true is a primitive property.
Gist of Idea
Being true is not a relation, it is a primitive monadic property
Source
Trenton Merricks (Truth and Ontology [2007], 8.IV)
Book Reference
Merricks,Trenton: 'Truth and Ontology' [OUP 2007], p.182
A Reaction
Even after reading Merricks on this, I am not sure I understand it. If a single sentence floats in the void, it is hard to see how the 'monadic' property of truth could accrue to it.