Full Idea
Ground is perhaps best regarded as an operation (signified by an operator on sentences) rather than as a relation (signified by a predicate)
Gist of Idea
Ground is best understood as a sentence operator, rather than a relation between predicates
Source
Kit Fine (Guide to Ground [2012], 1.02)
Book Reference
'Metaphysical Grounding', ed/tr. Correia,F/Schnieder,B [CUP 2012], p.43
A Reaction
Someone in this book (Koslicki?) says this is to avoid metaphysical puzzles over properties. I don't like the idea, because it makes grounding about sentences when it should be about reality. Fine is so twentieth century. Audi rests ground on properties.
Related Idea
Idea 17281 If grounding is a relation it must be between entities of the same type, preferably between facts [Fine,K]